It's good you understand that "/me gets angry" isn't reason enough to burst out and shoot people.
For such a matter you need to have a roleplay backing to the situation, you need to communicate with players more than a simple /me line.
The ban strike system does not apply to you, I hope you have learned from your mistakes over this past year and that you can be a better influence on others this time around, Not just Poor RP / DM.
Unbanned.