I think as long as anyone asks me about posting a picture of mine, it's okay. It's just asking for that permission.
I still have Swamp's photo for my desktop. I ask for permission for anything I do. Lots of folks want me to draw a picture of a snapshot or a photo. I can't do that without permission. It's not legal. And you can get into a lot of trouble, not to mention out of money.
I don't think it is necessary to post the name Boomer. Just PM the party about the use of your picture without your permission. Sometimes folks don't know they are doing something wrong. Even adults.
There was a photographer in my hometown that saw his photo(graduation picture) on t-shirts. The t-shirt was in "Memory of" of a student that died in a car accident before graduating the following year. He didn't make a stink about it, just for that very reason. But, I told him that I'm sure the grieving family just didn't think they were violating his rights. He says he was sure they didn't, but it still wasn't right. And he is right, it's not.
Bottomline: Make sure you get permission, even though it's for your own pleasure.