I agree, when a system doesn't have explicitly stated rules, that typically means that how it works is up for the community to decide. Unless you are a merit source, in a sense I think its fair game how you want to use your merit. You have to earn it in the first place, so if you want to sell it, transfer it to your friends or your other account, or whatever, so be it. However on the other hand, people have always left negative feedback for account farmers to try and dissuade their accompanying spammy behavior, so with merit making it pretty openly apparent which accounts have ties to one another, its not outrageous to say that strange merit behavior could be linked to less than ideal account behavior.

More than anything, I really think it comes down to whether or not its typically acceptable to tag owners of multiple accounts with negative trust, just because they own multiple accounts. Second comes whether or not trading/selling merit is generally acceptable, and to what extents.