
Decommission the cell phone - permanently.
Your suggestion reminds me of the time in the late Eighties, when those brick-sized cell phones were in vogue among the Yuppie crowd. A Marine friend and I were annoyed by one fellow’s extremely loud conversation at the next table in a restaurant (back when reception wasn’t so good). When the blabbermouth went to the men’s room, my friend “accidently” bumped into his table then “accidently” stepped on the phone, which had fallen to the floor, in front of blabbermouth’s date. When the guy returned and saw what was left of his phone, his date pointed to my friend. The guy was livid and threatened my friend with bodily harm. When my friend stood up and invited him to take the “discussion” outside, the clown backed down and left with his date in a huff. Other patrons bought us drinks after the two left.
I’ve done that, using that implement. Feels gooood.