I want to add that unfortunately, many members use a 2-scale rating when they vote. If they like the extension they give a 5 star vote and if they don't like it or if they of any other reason aren't happy, then they give it a 1 star vote.
In my personal view, the reviews are more important measure how good an extension is and how the user experience have been.
The behavior I am talking about has nothing to do with support, it's about giving poor votes intentionally to decrease the rating of an extension.
We are looking after such behaviours (and also intentionally to increase) in JED. Many times, this is connected with interests in other extensions.