Trying to shame people into getting vaccinated blew up in our faces -- we now have an entrenched group of people that seem to be opposed to all vaccines, not just those for Covid-19.
People will have sex in ways you and I don't approve of. If your plan is to get them to stop -- it won't work. Just as telling people not to visit their family during Covid didn't work.
A better plan is to get people vaccinated, make testing fast and easy, and to inform people about risk profiles.