There are two sides of the coin too. Running perltidy at the user end would be fine with me. He or she selects that feature. Running it at the server end would definitely chase me away, as it will change my style with some other style and thus remove my artistic freedom - I actually care a lot about style and layout, and the fact that it is changed by others made me decide to never ever write for books that change code style to their standard, as it then no longer is my code.
A second reason not to allow whatever form of code-reformatter is that many of the posts are just about this: why is may layout like XXX, and what should I change to get layout YYY. If that was formatted, you'd see no difference. Example.
Enjoy, Have FUN! H.Merijn