On at least two occasions some advanced MO users included in their comments phrases which were less than polite. I hope that these are isolated instances or else I would quietly and simply leave MO without a word. I don't know if these were the cases of autism or because their English is poorer than mine (I doubt it--my own English is poor enough).

If people would leave MO because they value politeness above MO imperfect manners then whom are the advanced users going to pester? :-)

> **PS.**   At this time  **( 2014-11-22**, h.22:06 of the USA Central Time Zone **)**  there are $\ 5\ $ up-votes and $\ 8\ $ down-votes (like they were needed in this case :-) -- one may wonder *who is who*? It's ironic that a simple request for being polite causes such a downpour of excitement.