Report anarchists to the police

According to the police: "Anarchism is a political philosophy which considers the state undesirable, unnecessary, and harmful, and instead promotes a stateless society, or anarchy. Any information relating to anarchists should be reported to your local police." I didn't realise someone being opposed to the existence of states was a criminal/police matter? By the way police, did you know that Anarchists cannot draw straight lines since they have no rulers? That's a sure way to spot them.