As a moderator, I welcome reports. You see something you don't like--even if it's not directed at you--report it. We can give someone 5 points, or 10, or 15, or 20 points, depending on the severity of the offense. And they don't get muted until they hit 50 points. So if you see something you don't like, don't feel bad about clicking that "report to moderator" link.
On the other hand, just because someone disagrees with you, does not mean you should report that to moderator. I don't care if they think your ideas are wrong. I DO care if they say that YOU are stupid (etc, etc). We have warned at least one person for trying to use moderator reports to "get back at" someone whose opinion differed from their own.