There is a badge for using 30 votes (Suffrage) in a day. There is also a badge (Vox Populi) for using the maximum 40 votes in a day. However, there are no badges for doing either of these multiple times.
What I am suggesting implementing a silver badge for using 30 votes in a day 100 times and a gold badge for using 30 votes in a day 300 times.
It has frequently been my observation that people tend to get the Vox Populi and Suffrage badges and then just kind of slack off of voting. It would be substantially beneficial to the community if people were out trying to get more voting badges.
And yes, there are definitely people who spend enough time on some of the stacks to warrant getting a badge for 30 votes 300 times without randomly voting up whatever material comes to mouse.