Why security can do not good

[Huff H Law]

The reason why it's hard to tell between violent assholes, traitors and vigilantes is that they all play the exact same, and should thus be treated the exact same by everyone.

I can't say for certain, but I  think the admins practice a good faith clause as far as security accidentally killing innocent people goes.

As in, if they have a good reason to believe you're an antag and their life is at risk, and they don't have a history of flying off the handle they'll get a bit of leeway

This is based on me admin helping being gunned down for picking up a spear near a sec officer while cloaked because of a genetic mutation

You are correct. As long as you do your job as a security officer not to grief but to genuinely arrest and punish wrongdoers you will not be banned.