This is something that should be fixed...
If A goes through a teleporter, and then B, B is the one telefragged, which is annoying. Somebody tried to blame the `prediction', that you're not where you `think' you are, but on the server, are somewhere else already, which is stupid.
Since even when A and B stand in a line to the teleporter, it's the same, and B can't walk through A and be teleported first, no matter how high your ping and how bad the prediction might be, and I don't see any bad predictions in this game, but maybe that's because I'm used to JKA, where you can count the ping time when shooting with the disruptor :S
It's sometimes really annoying, it works in other games, and I still walk through a teleporter after an enemy walks through - on purpose, since I'm used to `normal' telefragging.