Yes, but towards the bottom he admits he also wouldn't want his employees to post any picture making the company look bad. Such as a picture of them wearing a company shirt while engaging in illegal activity. That's the gray area he is referring to.

Going to burning man is not illegal, though. But I agree, he shouldn't do stuff he wouldn't want his employees to do. Doesn't he say he wouldn't even mind SM pics of his employees?

As CEO, he is a company shirt.

So if he, and his HR department, are OK with employees wearing company shirts at Burning Man (while also - ahem - half-naked), he's OK.

Otherwise, not so much.

I think he should keep his pictures up, but think about the company shirt at BM thing.