I noticed my L$ balance was -1, and checked on my account page. I couldn't understand this as I've never had any L$ and assumed I'd never spent any. On checking my details the L$ -1 was a group liability for a group I didn't know I belonged to and certainly was unaware that I would have liabilities for. It's a trivial amount of money and I can easily get a wealthy alt to pay it off, but I'm concerned that if it's possible for this to happen with L$ 1, it could also happen with L$ 100 or L$ 1000.