And another thing: your brand spokesman should look like one. Lose the Fonzie getup, Mark. That was outdated in real life by the time Happy Days first went on the air 45 years ago. What next? Will Gibson hire Suzi to be his Leather Tuscadero?
You normally never hear of cease-and-desist letters unless the recipient is stupid enough to make a public issue of it -- e.g., Kelton Swade, who dared Fender to sue him (they did, he lost). It's done quietly and stays that way if the issue is resolved. If it gets to the point of a lawsuit being filed, that's when you hear about it.
Proactively issuing a blanket threat to the general public is astonishingly stupid. Can you imagine, say, the corporate spokesman for Adidas or Nike making a video like this? Even an outspoken CEO wouldn't make a video like this.