Not by much, if at all.
Yeah, because racial discrimination is so much the same thing as not being allowed to be a glasshole in someone's business.
I understand that you didn't see the original point, so let me restate it in terms more favorable to understanding:
1. The "douchenozzle" who runs the establishment as if it is a private space, is probably misinformed.
2. The diner is a public space by virtue of the following, as EXEMPLIFIED by legal justifications on smoking in restaurants, and legal prohibitions of discrimination against customers based on race. "Public" spaces do not afford an "expectation of privacy," therefore "glassholes" should be able to photograph within because other patrons in this public space should not expect to have privacy.
3. I hope "Whiny Nick," despite being laughed at by the Internet, feels better for having drawn attention to his unfortunate experience, and it sounds as if the "douchenozzle" owner, while hopefully cleaning up after himself, will have clarified the policy in such a way that future Google Glass users will be informed before experiencing the unpleasantness of being confronted and ejected from a restaurant on the basis of technology they do not like.
Thanks for the lively discussion.