A dangerous new TikTok trend has police from Los Angeles to Florida sounding the alarm as they say the stunt is a fast-moving recipe for arrests, smashed doors and potentially deadly confrontations.

While “Ding-Dong, Ditch” pranks have long been regarded as a largely harmless nuisance, a newer, more violent version of the stunt as part of a TikTok challenge could be dangerous to all involved, ...