Yes, there is friendly fire.
It's really annoying when people decide to test their knives in the spawn....
Anyway, looks like the server(s) is acting up again, but I at least got in a bunch of games between server troubles.
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Tip for new players, you'll want to unlock the ability to revive fallen team mates because each revive nets you 10xp. Since you have to spend 2 skill points on the first tier of unlocks before the revive ability is available and you'll need another 2 skill points to unlock the ability to revive.
It's not only a great asset to your team, but it nets you more experience than a kill. It's especially helpful when you're in Frag-O zones because xp is doubled in those areas so you'd get a nice 20xp.