Inviting anyone and everyone you’ve ever said hello to, to your simchas, because you’re afraid of being “in their mouth” (i.e. that someone you barely know might speak badly of you) – resulting in:
A) simchas with at least 2 to 3 times the number of people who really SHOULD be there.
B) ba’alei simcha having to go deep into debt to make the simcha, AND (ironically)
C) people having to show up at the simcha who don’t even want to be there so THEY won’t be “in YOUR mouth”!