I see many Biden signes in wealthy suburbs, but not exclusively. So I don’t think it’s angry mobs they are worried about. In urban areas, that could.......and the key word is could..... be a problem. But not the burbs. Besides. Are you claiming Trump supports are in fact snowflakes? I would say rural America is strongly Trump, but Biden signs are beginning to populate the landscape there too. But the Trump signs way out number the Biden signs in the rural areas.
I live in a Cincinnati suburb that is generally very conservative. Biden signs have been put up by the usual D supporters.. a few Trump signs have gone up and then been vandalized or stolen, replaced after a few days each time. We’re getting ready to move so I’m not putting up a sign as can’t afford to be vandalized right now.