Someone jumping in the CC and not dropping or saying anything after ten seconds will get an eject from me. Ten seconds, in game time, is a LONG time to just sit there and do nothing. At least drop IP and armory, at least say 'checking for hive', at least do SOMETHING. By a scant ten seconds in you should already know the hive, have base building, and have people grabbing the RTs nearest base. It's amazing how quickly you can lose a marine game if you don't get started right. Like games where there is no comm for a minute or so. You might as well just give up. (and I usually do... if no one's comming by the 1:30 to 2 minute mark, I look for the nearest pit of dewm... of course then someone jumps in JUST to build an IP, which I hate. If you're in the CC, STAY IN THE BLOODY CC YOU FREAK) Even if you start building base at that point, it's far too late. You have no upgrades and no res capped and the aliens probably already have 3-4 RTs and someone's getting ready to drop DCs, the hive will be going up in 2 more minutes, and someone's already saved 4/5ths of the way to fade.
So yeah. No comm hurts. And newbie comm hurts really bad. At least with no comm you can just die from the rush and not have to worry about respawning.