You know, it's OK to suggest that I do X instead of Y. There's a good chance that I'll agree with you. However, there's also a damned good chance that I have a reason for doing Y. These might be legacy, environment, personal, whatever. At the end of the day, if I insist upon continuing to do Y, deal with it. Why do people who don't feel obligated to help me still seemingly feel obligated to tell me what I'm doing wrong?
Case in point: I've had some people tell me, in no uncertain terms, that I shouldn't write Test::Aggregate the way I chose to write it. They raised some fair points and had valid concerns. I have a test suite which now takes almost an hour without it. It takes 21 minutes with it. I have reasons for this choice. We've sometimes been frustrated with it, but I don't think anyone on our team would give it up. If you don't like my decisions, don't make 'em yourself.
Some people don't understand why I don't sprinkle magical pixie programming dust and just make my code perform better. I challenge them to come here and let's find out what dust they're snorting. It's not always the case that you can just make things work the way you want them. You have to compromise, but I am astonished at purists who readily acknowledge many areas where "good enough" is appropriate, so long as it's not an area they care about. Just because a problem isn't obviously NP-complete doesn't mean that you are always able to have perfect solutions.
We work in different environments. We face different challenges. They aren't always technical ones, either. It's OK to tell someone to "quit" if they're being asked to do something unethical. It's NOT OK to tell someone to quit just because their company is afraid to upgrade the MySQL database to the latest version. And yet this is the sort of asinine response I often see when someone is asking for help. (Ever think that the programmer might have a husband and kids and it's the only job in a small town?)
If someone needs help, it's OK to make suggestions, but for cryin' out loud, get off your damned high horse when you condescendingly tell them "you're doing it wrong".