I can't speak for Bugmaster, but for my own part: I value pleasure. If wireheading provides more pleasure than not-wireheading, and doesn't cost anything I value more than pleasure, I endorse wireheading.

Those are big 'if's, though. The world in which they are true is not one I can readily imagine, and the easiest means of getting there (e.g., editing me so I don't value anything more than pleasure) I reject outright.