"I also like wink features. I met my wife online because she winked at me. With that being said, many people are using the Friend request feature as a wink feature and people complain about that. Seems if we created a feature that does the same thing and call it a "Wink" that the same people might complain about it. For the picture unlock notification, what if someone unlocks and locks their pictures 100 times in a row and you get spammed with 100 notifications?"
The Friend request asks me to do something. The photo demand asks that I do something (I mean, it does it badly, because the wording is still all screwed up, but it does ask for something). A wink? That's just a thing that someone is offering. If the canned message did not actually open photos, but was something someone could choose upon opening their private gallery for a particular account, again, it would just be something that was being offered.
There is a qualitative difference between things that require a response from strangers and things that do not. I'm betting things that do not require something from strangers are going to be less annoying than things that do. And might even get a pleasant voluntary response more often than the demand notices.