it would be cool to have some kind of tag insim mod.
you could use the insim button thing to let all the players know who has to tag them.

or

one person is randomly choosen each round who has to ceapture al the other players whit in the timelimit.
the players who have to run can win by not getting "captured".

would it be possible to make a mod like this ?

That would be fun. I loved playing tag in the Rush games for N64 with my friends, that was always fun.

Even in LFS I've played tag and it is just as much fun as cops and robbers is after a year or so of not playing lol.