On March 16, police officers on patrol in London found someone's weed with their drug-sniffing dog, and replaced the stash with a snarky note. Sgt. Paul Taylor proudly tweeted a picture of their accomplishment (really the dog's accomplishment). 

While it's nothing new for cops to get sarcastic on social media, this is a new level of trolling. It the sort of behavior you'd attribute to someone who's smoking weed, not confiscating it.

Sources: Mashable