How much technical capability has Anonymous demonstrated so far?

Anonymous not only is composed of the technically savvy people, but has immense potential. If say, tomorrow, Julian Assange is conclusively killed by the United States (with some evidence saying it was the US Govt.) they would probably gather many new recruits. If an election was stolen in the US with a load of evidence of massive voting fraud, I imagine anonymous would add half of hacker news to its membership. Anonymous is pretty much a nerd-mob amassed as a response to whatever they're massing against. And their technical capacity is determined by what they're fighting. If its something stupid, its probably just the script-kiddies involved. If it's something serious and massively threatening the societal sense of justice, I imagine some pretty tech-savvy otherwise-professionals would get involved.

It's composed of a demographic that tends to lean anarcho-libertarian with a _very_ strong sense of justice and fairness, also coinciding with a demographic that tends to run most of the revolts/revolutions throughout history (men between 18-35). And is pretty much a subset of the 4chan demographic (which isn't too hard to get into/understand if you're a redditor; and who isn't a redditor these days?).

They aren't dangerous unless you're doing something wrong in their eyes: and while their evaluation of what is right is rather hazy, and their responses ranging from ineffective outrage to very disproportionate rage, I find it hard to condemn what is essentially a very democratic volunteer amassed group of people.

Enough to be dangerous. How much more to they have to demonstrate?