I would NEVER put plastic bags/condoms over my mics WHILE THEY WERE RECORDING. At moedown last year, it rained so hard they stopped the music for a few hrs. During this time I put a large garbage bag over the tree of mics on my stand, but would NEVER do that while recording audio
Unless I was packing up, I wouldn't hit stop. That's just one more thing to do when you pull everything off in a rush while a set starts or the rain ends.
This past weekend we had thundershowers during an afternoon set. Near the end of a set everything looks black and nasty but it generally held. So during the band intros 2 songs before the end, it starts to rain, I immediately throw a plastic garbage bag over the stand (can't really use an umbrella at headheight FOB for 30-40cm spacing...). Lasted like 20 seconds, so the band chatter is trashed, but no music was affected. Rolled for the next two songs and right as they are walking off the stage and I'm puting my mics into the bag (very quickly) it cuts loose.
I can just edit out the band chatter and cross fade between the two songs. If I'd hit stop, I'd have missed the first few notes of the second to last song.
Anymore, I have to have a seriously good reason to run in the rain. I've got too much money tied up in gear to risk it anymore.