@Francois: I think all this depends on what SE people can be convinced to implement -- and with that you surely have more experience than me.

@Francois: I don't know. -- Implementing such error flags would need some programming -- not much, if the SE software is implemented in a reasonable way -- but it would likely be some more work than realizing the few presently highest-voted proposals in this thread.

@ToddTrimble: I can't tell for sure as well -- just thought it worth to provide the link, without attempting to interpret.

Even though this is not directly related -- Mark Sapir has stated "Most probably I won’t be active on mathoverflow.net any longer: too many homework level questions and the community attitude towards these questions has become too liberal." -- see marksapir.wordpress.com/2013/10/25/mathoverflow .

I have made a related feature suggestion -- introducing error flags -- here.

@quid: I don't care whether or not the question gets deleted -- but if the community decides for deletion, I'd find it unreasonable if a moderator unilaterally overrides this decision. By the way: how many delete votes would it take to delete a question of such high score and with that many high-scoring answers?

I think if anything causes confusion here, it's the time zones. -- UTC is the same worldwide.

If a question is migrated e.g. to Math.SE, existing answers are deleted. -- Maybe this could be done in all cases when a question is closed as "off-topic"? -- This might reduce the number of answers squeezed in immediately before a question gets closed.

Why do you think so? -- Euclidean geometry is only one of various topics in mathematics taught in high schools, and I think it is certainly not the most important one. -- What about, e.g., introducing basic algebraic structures (groups, rings, fields), or really proving the things taught in calculus?

There are presently 4398 users with exactly 101 points -- see data.stackexchange.com/mathoverflow/query/155069/… . -- I would say this is quite an alarming figure ... .

@Todd: Of course this is a matter of opinions. -- If you consider the question reasonable, I don't want to argue against -- you can certainly judge better than me what is appropriate on MO. I thus withdraw my post.