I was at the Waters show in Camden, NJ Sat 9/16 and the pig he used there made no reference to Bush, no reference to "vote democrat", etc... and there was no real anti-Bush diatribe that I heard...I think after the reception they got in MSG in NY (major booing) he realized it needed to be toned down... and it was.
I go to a lot of music festivals--mainly bluegrass and related genres. As recently as last year, there would be substantial audience booing when an artist made an anti-Bush comment from the stage. This season, there have been many more such comments and no audible response from the audience.
Glad to hear that there was booing!
I hope there is booing anywhere where it happens!