Funny story, I actually created this with making people invisible to bots in mind, but apparently the notarget flag doesn't affect the tf bots.
So far only using the nb_blind 1 cvar makes bots unable to see people, but of course thats everyone, not specific targets. Meh, back to square one on that end.
Well , got this much usage out of it anyway, so it wasn't a waste of effort.