This is fixed already on some servers, but the WORST thing is when someone joins a game that is almost balanced, say it is 3 vs 4... they are forced to the alien team to make it 4 vs 4 and the required kill count goes up from 12 per stage to 16 per stage for the aliens.
Then they swap teams without making any kills. What this does is leaves an outnumbered team of alien players with an extra 8 kills in their quota to make up. Of course, the sort of players that do this are also the sort that will feed the humans a few dretches before swapping teams. It's just another thing in tremulous where one idiot can wander in late and wreck the fun of seven other people, intentionally or otherwise.
Of course, depending when they swap, they can also screw up the other team's kill quota by joining them.
