I'd say the man's tweet had bright neon lights pointing at the latch to open the door.
The man has a trademark and like it or not, under the law he is required to protect it or he loses it. Having been involved in two such disputes I can tell you the typical response, usually drafted by a lawyer is something along the lines of:
Dear [insert name of defendant here]:
[Name of trademark holder] has become aware of ongoing work [defendant] is engaged in which violates their trademark protected materials. Cease and desist all activities in regard to this project immediately and [insert rest of terms here, including but not limited to turning over or destroying all infringing materials, posting public notices of your infringement and apologizing for same]. If not we will be forced to pursue legal remedies.
Now, if another lawyer reads the letter they may think to ask for permission and/or licensing terms. If the transmitting lawyer is really, really nice [not all that common] they MIGHT leave a pointer that the plaintiff is really angling for a licensing deal but are required to respond in the manner indicated. In the first dispute I was involved in, the lawyer was directed to write the hint in the letter because frankly the defendant was bigger than we were and gave us great publicity. We knew the defendant had intended it as a compliment, but our hands were tied. Thankfully their lawyer understood, sent the appropriate reply, and we granted permission to use the trademark with the appropriate notice. In the second instance we sent the other kind of letter because there was no other resolution we would regard as satisfactory.