There is a surprising variety among even those who call themselves Marxists or anarchists. Some are way more practical than others. Marx was first and foremost a critic of capitalism, and his criticisms were way ahead of their time and right on the money. Anarchism covers a whole lot of ground that I wouldn't consider anarchism myself. The umbrella basis for anarchism is anti-authoritarianism. To me, that makes them less extreme than authoritarian socialists like in the Soviet Union or China. I'd consider myself an anarchist, but only in the margins that realize that government does play a critical role in establishing and defending freedoms.