Sometimes, when a particularly ridiculous question appears, a sarcastic joke can actually shed light on to the issue (by making the OP see how ridiculous the premise for the question is). They also can give some folks a good healthy laugh. However, these aren't the niceset way to communicate, and may potential offend the OP (In the case of some OPs, there is even a real risk they may take sarcasm for fact).
Case Example:
I wanted to post this:
No it won't work, Microsoft completely re-worked its entire API, just to show software companies who is boss. However they didn't realize that everyone would just switch to their main competitor OS, windows 7.
as a comment to: Is Blender compatible with Windows 10?
However I was afraid it may be deleted, or just isn't a good thing to say... Do we condone such comments?
Bonus Question Anyone think of a nicer way to make the joke?