Obviously. Let's assume you're already focusing really hard and recruiting as cleverly and effectively as you can. You're not so silly that you'd be recruiting in an unfocused, dumb and ineffective way to start with, right?
So you're clevering all over Recruit A and Recruit B. I decide I want Recruit A with Alias A. I don't think I can win that battle straight up, though. So I use Alias B to battle you for Recruit B and drain your cash. Now, despite your cleverness, I have a lot better chance to get Recruit A with Alias A.
We know you should do your best to win. Big 10-4 on that one. The point that milwood and I are making is that you're gonna do your best and be your cleverest no matter what. Someone using two teams against your one can have an advantage that's insurmountable no matter how many clever and effective moves you make.
Side note - I agree with tkimble above, about it not being widespread. If you new guys are reading this, I'm not hollering about something that happens a lot. I'm nitpicking a point of debate.