I'm seeing this on Facebook, and have no real hard info yet - but it seems a company, Volpin Props, has received a cease-and-desist letter from the company (I won't name them here, they've asked people not to harass the company) who designed the carpet above - this photo was taken at the Marriott Marquis hotel in Atlanta during this year's DragonCon.

It seems the C&D was over the pattern itself, used in the costumes above, that was being offered for sale by a different company that offers fabrics in varying prints. Said company no longer offers the pattern, one assumes they got a C&D as well. I don't know why Volpin is involved - I assume they created the costumes above.