In LCWeapons the faster a target moves, the higher the failure threshold is... I never tested it on warpers but it probably allows you to hit them without triggering security checks.
Artificially increasing the shot hitbox of a warper is a lulzy, yet effective solution to that problem... of course server has to establish the 'bIsWarping' and the shot coming from the client must also negotiate the clientside version of bIsWarping at that time stamp so server can find out if client is lying or not.