If you are concerned about guests leaving a bad review if you complain to them or to Airbnb:
If you open a complaint in the resolution center, this triggers an "investigation" by Airbnb. Then, if a guest leaves a review that pertains to an "investigation", you can request that the review be removed. Last I heard, it is Airbnb's policy to remove such reviews, but you have to ask.
This is the only situation I have found where Airbnb will remove a review, but is MUST be tied to an "investigation". So you need to report it!
And in case I'm wrong, or Airbnb has changed their policy since this happened to me, you can always leave a response to a review. I have had a couple of guests leave poor reviews for silly reasons (like, it wasn't what they expected because they didn't read the description), and I responded to their reviews with my own take on what happened. More than one guest has remarked to me about how much they liked these responses.
Good guests respect hosts who stick up for themselves. Respond to a bad review with something like "You told me 6 people were coming, then showed up with 10 people and I called you out on it. I didn't expect a good review from you." You will get guests that admire your guts. Just be polite and stick to the facts.