Professor Mark McKenna was quoted on the trademark of Dumb Starbucks.

“Fair use” can protect parodies of copyright material, but a trademark such as the logo has different protections that Dumb Starbucks may well be violating, said Mark McKenna, a trademark law expert at the University of Notre Dame.
Like others, McKenna suspects the store is a publicity stunt — but for what, he could only guess. – AP via Washington Post