Ironically what you do is against the guidelines. Here is an excerpt of the guidelines
Flag and PM if you have problems
It is fine to offer friendly advice, but please don’t play moderator. While your intentions may be good, it makes you look like a not so pleasant person when telling someone they posted in the wrong section. If someone needs moderator assistance, simply press the flag button on the post and your friendly staff can help!
(I know I know this includes me too)