This is called "Rai ka pahaad banaana" There is no rudeness or impolite behaviour. What if the original blogger was traveling for the first time in his life and asked a question. No question is stupid but answers may be.... It does not mean that we need to police everyone.
I remember long ago one person was searching for a NDLS to Mumbai ticket fare on the Mumbai to NDLS train number. In spite of many people correcting him he was saying the same thing "site is incorrect, when I search ndls to mumbai, mumbai to ndls info is coming". To this one reply was "aap sardar jee ho kya"... well may be it was rude but it was quite frustrating for...
more... many as the original blogger refused to budge.