have you tried apr?http://faderjok.tastyspleen.net/quake2/aq2.exehttp://faderjok.tastyspleen.net/quake2/aprq2_readme.txt
and anti-cheat runs smoothly with that client?
Not a bad idea to use Anticheat anyway, especially if you have the ability to do so. Then again, I don't think you should feel "forced" to do it either just because one person accuses you of something in error. If you aren't cheating and simply don't WANT to fuck with it, then that's everyone else's problem and they'll just have to get over it.
Whirlingdervish: you sound like a very angry person whose mind is already made up based on these really shitty and inconclusive clips. I am very happy you are not the decision maker / admin for these servers. I am very confident the admins will agree - there is no bot use here.