Although spawn protection isn't exactly a bug and probably shouldn't be discussed in this thread, I would like to add that spawn protection is, by definition, unfair.  The two "fairer" remedies are 1) not allow them to shoot while they're under spawn protection, 2) not allow spawning after round starts.

Additionally, although I'm unaware if you have this or not, but spawn protection during DM is unfair, too.  It actually ruins the fun and the point of DEATH match.