Funny how guncrasher goes straight to the campers comments. Has nothing to do with it. More times than not the spawners get the first shot because they have a built-in delay after they spawn where they don't render on other peoples' screens. That's how they can turn a turret around and "appear" to already have their turrets pointing at you.
No, it's a matter of double standards. I'm all for GV supplies as a gameplay addition, with the acceptance that it's not realistic but it's a gameplay feature. That said, I agree with this "make them wait" issue. After all, like you said, they can just tower and be back up in 2 seconds, right?
Right?