Force lagging on purpose to harass.

Is force lagging on purpose to harass someone in a training room allowed?

What exactly did he do?

Him and his friend were force lagging just to gang up on me and kill me and taunt with verbal abuse. So I wanted to see if it was distance spike or something, so I went to a real TDM of a room he was in and he had no spike. annoying ...

That is not allowed - you can report them.

You can read more about our rules:
Freestyle GunZ rules and regulations.

And how to report a player here:
Hacker and Player reports.