In all the threads on this topic I haven't been able to find a quote of what exactly is in these block headers that is supposed to be so controversial, just a bunch of chat logs where this is alluded to. Maybe "I'm eating a big juicy hamburger" would offend some vegetarian miner somewhere, but chances are that person gets offended by a lot of things in life and perhaps even seeks out things to be 'offended' about. As long as there is nothing illegal or really nasty (e.g. advocating hatred/violence against some group of people) then I could give a rat's ass what's in there.