Writing to myself

Writing is sort of like talking to yourself. The words are often the same with the difference being you aren't making sounds others can hear. I don't know if this makes sense because I am up pretty late (almost 3 am EST) and what seems to be making sense to me, might be complete gibberish to someone reading this.

How often have you heard someone say "I must be going crazy because I'm talking to myself." People say this, I think, because they want someone else to reassure them that they aren't going crazy, by saying something like " Hey! we all do it at some point," or "Don't worry, unless you start answering yourself." Wouldn't it be interesting to have some fun with someone's insecurities? What would happen if you made a comments like; "Ya, I was beginning to think you were a bit crazy, but now I know for sure." That might drive some folks over the edge, so you might want to be careful when dealing with someone who is sensitive to criticism, especially if they are crazy. They say laughter is the best medicine, so doesn't this mean that laughing at someone is good for them? It's like you're doing them a favour, right?