In a bit of a departure from the past, it sounds like Blizzard has been working harder to ensure that innappropriate maps are not uploaded on Battle.net

Their statement:
While players are encouraged to share the maps they create through Battle.net, published maps are subject to review to ensure that they promote a fun and safe environment for all players…
If a map is found to contain inappropriate content, it will be removed from Battle.net and the map maker will be contacted via email.

“Keeping people from seeing your hate speech and obscene images on our private game service is not the same as relinquishing your constitutional freedoms in the hopes of increased personal/familial security. Ben [Franklin] would tie you to a kite and let go of the string for making such comparisons.”

So much for maps shaped like male genitilia!