Trust me, it's worth it. Because of your skin some random @Janppa always calls a kos but relises the guy is disguised.
The radio. jk I use it when there are 3 people alive and it spooks people. I never used the flare gun tho :3
I don't think I have ever bought a disguiser in my life, mainly because I usually talk my way out of situations.
If we're going off of any weapon including guns then aug, it's so bad compared to the majority of weapons if not all. If we're talking about just the traitor weapons specifically then teargas, BUT I'm thinking of trying it out and using it in certain situations like earlier mentioned in a tester room, especially if one of them has a scrubblebarrel I completely forgot the teargas even existed until I read this thread. Other then that Malfunction pistol, if you want something done you gotta do it yourself, plus it never works for me. Ever.
I'll put it this way, I think I've gotten more kills with a crowbar than I have with the Huge and AK as a T. Also the Silent Pistol is pretty lame along with the knife if it doesn't have the one hit kill upgrade.