Why is Anarchism mostly taken as a joke?

[The Grand Nudger]

Well, the first thought that pops into my head when I think of an anarchist is a kid with a mohawk listening to System of a Down, a girl with purple hair and fuzzy armpits dressed like a man being cynical about every single last thing, and a crazy dude with a roll of dynamite screaming "TEAR IT ALL DOWN!!" However, I AM educated on the idea of anarchy in that its ideal form is one where people do things basically on a humanistic basis; baker bakes his bread and gives it away for free because that's his role in the society, and in turn the butcher gives the baker some of his meat, and the farmer gives the baker and butcher some of his crops, and all of them give the volunteer militia who keep everyone safe from harm from the outside food for their volunteerwork. The doctor treats his patients because that is what he is supposed to do. The concept of money is largely gone. People just function in their lot in life because it's what they're meant to do and in a sense everyone is working for everyone else. There is no concept of rule or law in doing so; it's just mutually beneficial. People who do not hold up their end of the bargain yet are capable of doing so are cast out or are not allowed to partake in the work of the others.

It makes sense. It's just...modern society and culture just isn't compatible with it, is all.

You may be adding a whole hell of a lot to anarchy there amigo. You can have anarchy and keep money, no one has to volunteer for shit, and outing people from the system borders on a publicly enforced government (which is all that you have to toss out to have anarchy in the first place). You seem to be mixing some idealized form of communism into the mix.

(Professional soldiers>volunteer militias btw)