You already have the border effect on mouseover, so I was thinking just have that be up all the time, just to say “there’s supposed to be something here.” A default picture would be fine too, but that seems to me like it might be a more complicated change. I didn’t want to make it overly complicated, as long as there’s just something there. Otherwise you’ll likely see at least a few people showing up to ask “why is the menu broken/hidden?”
I’m not using Gravatar. Gravatar is an option on Discourse, but I’ve uploaded a picture directly. I’m still using the default picture on the WK website itself. Even so, I didn’t explicitly block Gravatar. The Ghostery plugin, which I use for privacy and security reasons, blocks the site by default. I don’t mind whitelisting it for WK, but it took me a couple seconds to figure out what was going on, because I didn’t know it was blocking Gravatar.