Don't blame the way a user interacts with a site or service. Instead, design productive and amicable solutions around the way a user interacts with that site or service. Get to know your users and either educate them and/or design solutions to reduce their barriers.
Why do you, @fiona assume that @Ralf0 was responding to a review he didn't like? I don't see any mention of him saying he didn't like the review and we don't know the reason why he wants to delete it. Limiting ourselves to only creating assumptions is one of the main reasons why sites and services create blockers for users. Assuming is important but only the very first step in understanding how to design for a solution.
"You can't delete or edit your response." - sounds very oppressive to a user and shows no attention to the user's needs.
"It pays to take a little time and breathe deeply before you respond to a review you don't like." - is an assumption that commonly leads to oppressive design that creates blockers for users (based on experience and data, not assumed).