It has everything to do with FBI. If FBI were not so uptight about their skins and cars then there would be no such problem. Of course people can RP FBI as civilians, but not as law enforcement. This is what it boils down to no matter what. Everyone tolerates this, it has become accepted over time. I have disagreed with it forever, however since I would rarely RP FBI anyway I don't really care about it. Some people like to RP FBI, but are ridiculed and distrusted as they have to take on civilian skin. (Remember UC and civilian FBI skins are relatively new since FBI started).
People being suspected for impersonating FBI. This is fair enough (so long as the appropriate RP was involved). Then they moan for being suspected and crying about abuse. This I believe is very wrong and I agree with El Boricua on this - this might be one of the main causes, but it definitely does concern the way FBI operates within Argonath. It was always gonna happen - and now it has - the point where someone wants to RP FBI without being official but cannot due to the restrictions caused by the official FBI.
To blame this on FBI is ridiculous, if there is someone responsible for this then that's the people that yelled abuse when they were suspected after impersonating the FBI.
All we wanted was to restrict painting EMS and FD from being painted FBI and SWAT colors. But the developers decided to make it affect all.
No one is saying you did this on purpose, but this issue has arose directly from FBI not wanting to share. The damage has already done. If you were to allow FBI (and SWAT) skins to all cops, for the first 3 weeks you will have millions of agents and SWAT guys running around and all would be chaotic. Eventually though it would normalise similar to RS1 where the people who wanted to RP FBI and SWAT would do so, and everyone else will get bored and RP what they usually do.
If FBI did not moan about people pretending to be FBI vehicles, scripters would never have to even do this. They did it for FBI sake only because you didn't like the moans from what I have read. Quite right that you don't want people wrongly calling you abusers... but really... do you need script support to stop something so minor?!
Ok so let's look at the problem at hand:
- Medics painting FBI rangers and only FBI are allowed black FBI Rangers.
- Firemen painting FBI rangers and only FBI are allowed black FBI Rangers.
- Same thing happening with raindance helis.
- Same thing happening with SWAT colours.
So medics and firemen have been 'abusing' /carpaint so they look like FBI. I do not think this is abuse and don't see why it is a big deal. Abuse is giving players unfair advantage right? Well I don't see how this is giving any (unfair) advantage if loads of medics are getting /su'ed for impersonating FBI, nor do I think being able to drive an FBI rancher as an unfair advantage in itself. Being able to RP the same role, or drive the same vehicle as anyone else would just be plane old 'fair' to me. (Yes I know there are further implications than that, I'm just entertaining the thought). Anyway so here goes.
Obvious suggestions:- Disallow /carpaint on SWAT/ FBI vehicles (scripted)
Or
- Medics and firemen have 'abused' vehicles for other RP so take them off them. If they are medic or firemen they should take on that role (or similar) or make use of civilian skin options (E.g. use civ skins to be crazy doctor, use medic skin to sell organs, fireman skin for stripper or whatever as long as it is relevant for the skin).
- Allow official police groups to support colour coded police groups (would require more script work than any other and I do not recommend but is option)
- Just undo the whole thing and let FBI and admins handle the "im abused!" moaners like they should do. By ignoring them and allowing to solve through RP. E.g. I bet they would not shout abuse if an FBI agent pulled them over and said "Wanna be real FBI? Patrol with me and see what it's like and make application if you like it"
Less obvious suggestions with deep implications that I will probably get shouted at for even suggesting. - Open SWAT and FBI freecop equivalent skins. Sure you will have lots of Agents and Operatives for the first week or so but same happened with firemen and anything new. Have some vehicles reserved for official guys (they have HQ's anyway) and just add a few for the freecops.
Then I can also use the Enforcer for Immigration Patrol etc 
. This will solve tension in the long run and allow more diverse RP. Remember there will always be abuser freecops no matter what the skin.
Since I have wrote this much I might have forgotten what I originally intended to write. There may be more suggestions.

One thing I will add is that scripters and management listen to moaners these days and get depressed (and who would blame them?). They try hardest to make it right and add new stuff and more people moan and complain. Unfortunately this is probably one of those things and I'm sorry if this causes unnecessary work or stress, but I firmly believe that this is a step in the wrong direction and whilst it helps few it neglects the mass majority.
Thanks if you read this far.
Jcstodds