I can't say a whole lot about this... but I do have a general observation ---
Sometimes people think they are being "funny" and helpful, but they are really showing that they are immature, self-rightous jerks.. Along the way they are showing themselves as rude and pretty much taking advantage of those who are trying to help them. I'd say this is a factor of age, but really it is about maturity -- young doesn't seem to factor into it.
People like this make me realize that those who don't help others and just look out for themselves may have a point. Going out of your way to help people only opens you up to being kicked in the face and disrespected. What good is that? Maybe I'll take a cue from a colleague and only come in to do my job and that which helps me.
On the other hand, there are people that make it worthwhile ---