They rail against people who take VC money. At the same time they take money from an investment firm. They they say that their taking money was okay because they wanted the advice of the investor: http://37signals.com/svn/archives2/bezos_expeditions_invests... Other people taking money to get access to investor advice is bad and a disease.
They rant against startups that pursue the eyeballs business. But then they publish blogs that are frequently contentious and create drama in the startup community. Really, RoR aside, if DHH didn't swear at conferences, or if 37 Sigs didn't throw rocks at other people's business models, would have heard abou them as a company? They like being the "bad boys" of the startup world. Bad boys get eyeballs and 37 Signals upsells those eyeballs.
The only problem that I have with 37 Signals is that they constantly say that they aren't doing the things that they are actually doing.