In general I would ignore the question, as you cannot possibly hope to understand all questions.
Many times I've asked forum questions and got silly answers like "Why would you do that" or "no that won't work" etc, plainly the answerer cannot understand the question - but this does not mean it is an invalid question, it is just a communication problem.
Some people are fantastic at divining the true nature of the OP.
If you have trouble understanding the question or think its invalid, it should be left to the moderator to decide.
Over fastidiousness is rank in places like stackoverflow.com (seems nicer here for some reason), there should be a greater awareness of people who don't speak English natively, or are just young or not very literate, or in-fact are just having a bad brain day. It doesn't detract from the fact the OP has a problem that they feel needs solving.