It might seem petty, but it's a stand that I'm willing to make. I have and will continue to use my wallet in telling companies exactly what I think of Steam.
Hey that's cool man. FNV sales on Steam were pretty high last year. Bethesda did quite well. If you're rather not enjoy the PC version because of one little thing, that's fine.
The other side of it, if they use any other type of DRM, there are going to be a flood of threads about that as well with similar arguments.