Mathoverflow is not intended for everyone.
Now -- you can of course do much better than just leaving this sort of comment. (And leaving offensive or rude comments is unacceptable.) Many people include links to Art of Problem Solving when they suggest a question is inappropriate, and that's often helpful.
I think at the moment the community being hostile to newcomers is a much much bigger problem than people asking inappropriate questions. These are still happening at an extremely low level. If you're bother by the current rate of off-topic questions, I'd suggest you slow down your use of the site, perhaps restrict your attention to some interesting tags, and spend more time asking and answering real mathematics than trying to keep an eye on the whole site and dealing with the moderation problems.
Essentially -- given that at the moment we have plenty of enthusiasm for moderators, and not that much need for it, I hope that the calmest, politest and most helpful moderators can be left to do the good job they are doing, and those who get riled up by inappropriate questions can make their life a happier one by ignoring them! :-)
]]>Though I'd like people to specifically address the inappropriate question, here's a list of basic reasons for closing a question (see this section of the FAQ for more details):
Are there any that I've left out? Are there any that need further elaboration?
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