You can always get a handful of people on Stack Overflow that go round serial up-voting. It has happened to me before and I can only assume it was done by the same person as all votes occurred in the same minute. I go on Stackoverflow not only to look for some solutions to problems and other snippets of information, but to help the Joomla users on behalf of my company.
If seen in my profile that 70 reputation has been removed due to being serial up-voted, which I am ok with as serial voting is plain stupidity, it makes my company and others it happens to look bad.
I e-mailed that Stack Overflow team requesting it be removed however they said it could not be done and that they could only warn the person responsible. To me, this is not enough, therefore is there something that could be done so that the reputation removed does not appear in the activity feed, like some sort of appeal form? Or something along those lines.