I guess I'm the odd one out here. At times I get annoyed by how much more crowded January is at the gym than November was, but out of shape people who seem like novices on the machines generally don't bother me. The Resolutioners might be procrastinators, like ActiveAndFit says, and of course many of them won't stick with it. I still have to give them credit for making an attempt, though. That's much better than the people whose inactivity and diet are killing them and who yet don't even try to work out for a month and a half or however long the Resolutioners in your area last. If there are out of shape people in the gym, I applaud them for making a serious attempt at getting into shape, even if they might fail and crowd the gym in the process. No matter how small the weight being lifted, it's better than not doing anything at all.
The only people who really annoy me at the gym are the obliviously rude. You know the type, the people who think that the gym is only there for them, noone else. They claim multiple weights or pieces of equipment at once even when the gym's at full capacity, they fill giant water bottles from the drinking fountain despite a line of people waiting, they hold conversations in doorway or on narrow staircases, they don't bother to rerack weights, etc. And, sad to say, many of them are among the buffer people present.