Please note: If I post a comment on a question or an answer, I have no objection at all if anyone "steals" ideas from the comment and uses them to write a good answer. In fact, sometimes I leave comments deliberately for people to do that because I don't have the time or the inclination to develop them into a complete answer. I don't even mind if you take an idea from my comment and type up an answer based on it faster than I can. Ideas can not be stolen, they're not property to begin with. This is pretty much rough-consensus on how comments should be treated on SE sites anyway.