OR we can all behave and stick to one account, just a thought. :P
There is no rule against multiple accounts, but if you are going to have so many then it is your responsibility to manage them. Many members have multiple accounts either because they keep getting gagged, or they may want to move around unknown. I'm not saying this is everyone's plan, but I don't think the site needs to accommodate those with so many accounts they can't handle their mail.