Flight of the Wisconsin/Indiana Variety

I'm generally neutral on the protests et. al. that are going down in Wisconsin right now; I don't feel that I know enough about what's going on to have an informed opinion. But fleeing the statehouse to prevent quorum (which seems to have happened in Indiana as well) strikes me as bad sportsmanship on the part of the Democrats. How is this any different than the various and sundry stalling tactics (threatened filibusters, anonymous holds, etc.) that Republicans have been using to block the Democratic majority in the Senate? If anything this is worse, because lack of a quorum prevents any business from getting done, yes?