I don't want voters to be swayed by Selection bias and rather to vote for the features (sessions in our case) that objectively look of most interest to the voter.
By showing the number of votes per suggestion, it has two negative impacts when trying to get an unbiased view:
1. It puts the most-voted-for suggestions at the top of the list, therefore getting more views and therefore more votes
2. It causes people to "go with the crowd" and/or "not waste a vote" rather than voting for the suggestions that are of genuine interest