Critter on the Roof

A message posted last week on Cleveland Park's Yahoo group:

We have a raccoon which frequently climbs to our 2nd story flat top roof. It is so brazen that it will watch through the skylight while we eat. It seems to think the roof is a private outdoor privy & deposits droppings. Any suggestions for a repellant? Does the city provide a trapping service? Any suggestions short of violence?

(Emphasis added.)

Not the first report we've seen of a voyeuristic raccoon. Can we call it a trend?