As someone who can (and does) read deleted posts, this is false. There are basically equal deletions of pro and anti vaccine comments. Our goal is not to silence one side, it's to keep discussions baseball related. I've deleted posts with which I have agreed, and the other mods presumably have as well, because they were likely to derail threads. Hell, other mods have deleted posts that I have made that were (arguably) over the line.
I try to moderate as little as possible, because I enjoy a healthy debate and love when the board is active, but history has shown that you vile f***s cannot be trusted 100% of the time!