It's the only theory that fits my observation.
Every time I check in, I see 2 people logged in to the software forum. They logged in and never logged out. It's been that way for a week and is creeping me out. It doesn't matter if it's 7 am, 8 pm or 3 am, there's always 2 people. If real people log in their count is added to the perpetual 2.
The software forum: You can log out any time you want, but you can never leave.