Based on other comments, I was under the impression that some people wanted zero unsolicited feedback. This instead sounds like you don't want people to keep of

Based on other comments, I was under the impression that some people wanted zero unsolicited feedback. This instead sounds like you don't want people to keep offering suggestions after you tell them to stop. The former would make for a really cold society. The latter is completely understandable. I would tell the repeat offenders to fuck right off.