I'm really, really new to GMing PFS, but it would be nice if I could let my friends legally replay for no credit. I have a pretty small group of players, so if one of them misses a game, we can't field enough folks to put together a legal table for the person who missed out to play. I've ended up just running a them again without it being an official PFS game if the player really wanted to try it, but I feel bad those players won't be able to get credit for that scenario.
I get the spoilers issue, but frankly, I'd rather let people play and deal personally with disruptive players, than have someone miss out on the off chance someone /might/ spoil things.