@Maggie465 My understanding is that if you say you wouldn't host them again, they will be blocked from booking with you again.
As for the review, we live in the age of social media. If you are going to shy away from leaving honest reviews because of what a guest might post on Facebook, you would be doing other hosts a grave disservice. You can't live in fear of some bad review.
That said, what you describe, as far as the mess sounds to me like what I would expect from a group of 20 year old guys. Leaving the microwave door open sounds like a total non-issue to me.
You don't say what house rules they broke, but just leave a brief honest review, saying they disrespected house rules, cleaning required more time than normal, and didn't fully shut the cabin door when they left.
And be aware that hosts who don't use Instant Book are not privy to guest star ratings, so please don't be one of those hosts who leaves low star ratings but a generic nice written review, because that misleads non-IB hosts.