Be honest here, does it REALLY matter? There are other ways to boost the size of one's e-peen. Be a part of the community as you are, nothing changes with your whenmade or forum account. No one's going to think any less of you, save for very few people who think that age of whenmade > anything else. And you don't need their respect anyway. People will respect you more if your whenmade is December 2012 and you're involving yourself with the community, helping it, having fun in it, than if your whenmade is January 2008 and you're a complete asshole.