Part of my misspent youth included some vandalism. When I was in university in Edmonton, I rode by a big temporary roadside sign every day. One fall morning they were advertising ADVENT CALENDARS for $3.99.
When I rode home late that night, I couldn't resist shuffling a few letters. For the next 24 hours, Colonial Meats sold CADAVERS for $3.99.
That kept me amused for the rest of the term.