I probably wouldn't have called Kroger (King Soopers / City Market) HQ until they actually tried to restrain you from going about your business, or told you to leave. It almost seems like they knew OC was legal, but didn't like the idea, so they had security follow you around. Once you contacted them, you allowed them to come up with a quick policy of "let us know". Now, since you contacted the HQ, do you have to let them know anytime you walk into a Kroger owned supermarket? If you don't could it be trespassing because you were told you were allowed in IF you let them know?