I'm OK with the principle, as it allows for fairly aggressive play and encourages teamplay rather than lone heroics.
In practice, we get choke points chock full of deaders. You stick your head round, find a bunch of enemy players standing around chatting, and have to make a snap decision about whether to ask if they're dead and risk being shot for your consideration, or to pew-pew them to be sure and risk tears before lunchtime.
Very minor nit, it's rarely really an issue. It would however be mitigated by dead rags. I mean, if folk used them consistently, which they probably wouldn't.