Does reporting players actually do anything in STW?

Lately I've had multiple teammates destroy my defenses and then quit after the mode starts. It seems like the new "trend" to screw over your team. I'm only on level 34 missions and I can't do them myself because my equipment is mid.

But then I get these terrible people who join just to troll and leave. I report them; but they end up back in the game again an hour later.