I opened the home page this afternoon to see five updates from a player that I didn't recognize.
These weren't comments or replies - they were two skill completions (Tinkering I and Penpersonship I), two achievements (Promising Lush and Hollow Leg Award), and a level up (Level 4). Scrolling back in my news stream I see an achievement from yesterday that I didn't catch (Pork Fondler).
I checked my friend list and I checked their friend list and we're not on each other's list. I haven't connected with Facebook or Twitter. And I don't recognize them as anyone I may have invited in the past.
They appear to be a returning oldbie and these are their first interactions with the game since May.
http://www.glitch.com/profiles/PIFDIL78FD01TLN/
EDIT: Well, making friends with someone named Bender admittedly sounds like the sort of thing I would do. If there's Dev Dark Arts involved in name-changing maybe that's what's happening here?