[Thermopyle]

If they are doing the landshark crap, all you can do is kick them. Then try to keep them out.

If they are using the ladder to switch teams (such as Axis to Allies on the Hunt) so they are close to the objective, then you can make the time to join a team very short (5 sec). When they switch they will be dead, and have to wait through the entire round. evil:

Added: It also puts a stop to the lame team switching grenadiers.