I have been browsing a few new blogs and photos on flickr for mailart and other postal ideas recently when I came across quite a few with pictures showing addresses of other people. It is a bit disconcerting to see such disregard for other people's privacy. I don't post pictures of my address or the addresses of those I sent do.
I cover the addresses up (the above is one envelope I received a while ago, and I posted about it earlier), although I let this beautifully calligraphied part of my address through (again, shown in an earlier blogpost).
I do have my postal address on a couple of websites/forums, but I chose to put them there, and I believe only viewable by logged in members to the respective sites. I also have put my address in some friendship books, again, put there by choice.
I know some of my penpals blog about letters.... I haven't read all their blog entries, but if you are reading this and have put a photo of my address on your blog, please please, could you remove it.