At least they do something and stand for their convictions, which is more than I can say about a good many people.
To me I can't really see how you can say that and then do a 180 and say that people are stereotyping them. Trying to label anything in the group, if you can even call it that, is like trying to describe the shape of an amorphous blob. There is no boundary that says "you are or aren't a member", even, anyone can just claim "I am a member", nor is there any real level of cooperation among the people. Ultimately it boils down to a whole bunch of individuals doing individual actions, and in a few rare cases a small team of individuals doing an action; there is little unity besides the name.
And again, I don't know if you can really call them a political activist group, either, simply because of the wide variety of things that have been attributed to the group. If you point to a whole bunch of charity work and say "X did it, and I'm a member of X so I would know", does it mean X is a group which focuses upon charity? If yes, I then point to a bunch of low-key thefts, and say the same for them. Is X still a group which focuses on charity?