Crush them. Just don't be surprised when the powers that be work to remove the negative reviews. Most review places have automated systems to pick up on a sudden increase in negative reviews and flag it for overview - which of course, if it's a bunch of lefties attacking a bakery or something, they'll let that through... but if it's a bunch of conservatives, they'll purge those reviews pretty fast.

Still... better to let them know how badly they fucked up.

Be sure to sort reviews by newest, and upvote any other 1 star reviews.