I'm well aware. It is therefore even more problematic if this account is abused --- note that there have been multiple confirmations that username2 has been used to downvote the same people that VoiceOfRa was downvoting before; in addition, VoiceOfRa has used the username2 account to start arguments with NancyLebovitz in a way that makes it look like a 3rd party is disagreeing with the decision, rather than VoiceOfRa himself. At the very least, it is better if everyone is aware of this situation, and ideally we would come up with a way to prevent such abuse.
I've gotten sufficient evidence from support that voiceofra has been doing retributive downvoting. I've banned them without prior notice because I'm not giving them more chances to downvote.
I'm thinking of something like not letting anyone give more than 5 downvotes/week for content which is more than a month old. The numbers and the time period are tentative-- this isn't my ideal rule. This is probably technically possible. However, my impression is that highly specific rules like that are an invitation to gaming the rules.
I would rather just make spiteful down-voting impossible (or maybe make it expensive) rather than trying to find out who's doing it. Admittedly, putting up barriers to downvoting for past comments doesn't solve the problem of people who down-vote everything, but at least people who downvote current material are easier to notice.
Any thoughts about technical solutions to excessive down-voting of past material?