Urban Terror (Q3 mod) had a simaller system (as I'm sure many other games also have), but if you are running through the spawn real quick it gives them an extra couple of seconds to line up a really good shot. But the advantages of such a system outweigh such small greivances as this so yes I think it could work well.
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[This message has been edited by Graverobber (edited January 13, 2002).]