To make it clear what I am talking about - I would expect any voting distribution for 16 votes to be at least semi-random on a controversial comment, in example such as this:

However, the distribution as it occurred looked like this on the first 16 votes:

A controversial comment will have such a ratio, but any comment controversial or not will almost never have this kind of distribution unless there are multiple accounts waiting for vote up events to occur so that they can send a vote down.

I can believe this happening 2, 3, even 4 times by chance, but not 8 times.