Is there any rule about excessive (up and down) voting?
I'm asking this because someone upvoted 15 of my questions/answers in one minute. I'm not sure whether he did this in good faith or not, but certainly this will be considered a serial voting by the system and soon these votes will be reversed. I consider an abuse doing such things (voting irregularities?), and if there is no rule about this maybe it's time to be one.
Update. As I said, the system reversed the serial upvoting. I still think the users doing this should take a break for voting irregularities.