I went to post a question on installing Windows 8 on my ARM-based tablet, only to find myself confronted by this presumptuous checkbox:
If I knew the answer, I wouldn't be asking! What reason is there for this insult?
I'm glad you asked! This option isn't for you. It's for people who know things. And want to share that knowledge with others.
Maybe they've seen a lot of people asking similar questions on a thorny topic, or struggling to diagnose a complicated problem, or just spent hours fighting with a misbehaving hardware - and now they want to save you the trouble of even having to ask by providing both the question and its answer together.
This is nothing new - it's been explicitly encouraged in the FAQ since Super User launched. But a lot of folks never realized that it was acceptable, so now we're building it right into the system. For now, it's limited to users with at least 100 rep, but this may be changed at a later point.