> However people are afraid to leave her negative reviews because they don't want her to leave them a negative review as well. It's ridiculous.

I work at Airbnb. Maybe we have to do a better job of making it clear that the review is double-blind, to prevent this dilemma. Go ahead and write an accurate review. It can't be seen by the other party (or anyone else) until two weeks have passed or the other person wrote their review, whichever comes first.