Ending community names with "porn", so earthporn, designporn always kinda bugged me for some reason. I like porn. I like beautiful non-porn pictures of nature and awesome design too. I just don't know why we need to conflate them or use the term 'porn' as shorthand.
Because it's cheeky shorthand that conveys a certain aesthetic fixation with whatever the subject matter is. It's certainly more interesting than just appending "pics" to everything. I'm open to alternatives, but language changes, and I've already gotten so used to it I don't even think of actual pornography first when I hear the term.