'pends. You gotta be antimimetic without saying you are antimimetic.

One answer is to move on from the party when it isn't fun anymore and start a new party. Like the way you are at the bar at last call and get an invitation to a party where they're drinking at someone's house.

More than one statue of limitations ago I was in an activist group that helped take down a public corporation (they deny our responsibility) and it was not hypothetical, we were being infiltrated by the FBI, and pretty regularly we made a new mailing list with names that we trusted and moved our planning there.