Yesterday, I alluded to the fact that our interpretation of an action is often entirely dependent on the setting of that action (and to some extent, the differences in our personalities). On one hand, it's strange that we have these double standards, but on the other hand, it's completely appropriate.

Waving frantically for a taxi: necessary
Waving frantically in someone's face: annoying

Bikini at the beach: popular
Bikini at the dentist: lewd

Taking pictures with your family at a restaurant: normal
Taking pictures of someone else's family at a restaurant: creepy

This is comedy people. I could go on like this all night.