You're right it's not for you to decide, but pressing the alert button just because you don't agree with someone politically is abuse of the function. That's what the disagree button is there for.
I use the alert when people personally attack me with name calling like Count blah personally attacking me by calling me a nazi. Or bng attacking me personally and not the message I posted.
Like I said my post was a response to InCharge, it's impossible for it to be violation against anyone but InCharge and I don't see him whining about it.