Any DRM, Steam included, is insulting if you ask me. If Steam wanted to truly be customer friendly then the online features would be optional and you could install offline. Same with SecuROM, limited activations? Screw you... I don't agree with it, it's insulting, it tries to tell us we should pay the same price for renting software as we used to for buying it outright (yes I know the manuals always called it a license but that meant nothing without the power to enforce it).

All that said... I don't find it insulting enough to not support the game and the remaining PC developers for two reasons:

1) As long as the publisher exists they will make sure you can play your game.
2) If the publisher dies you can crack the game and no one will care. Cracking DRM is easy on the PC because it's an open platform. I don't support cracks for games unless you NEED to do that to run them, but in that case there is nothing wrong with it and it's always an option on the PC.

Steam or SecuROM style DRM on a closed platform game is complete and utter BS though and I will never support it. I don't play console games anyway, which makes this easy.