I totally disagree. Slacktivism is a thing. It's easy, especially when you're jobless or still at school or without any social life or hobbies to be an activist online. It's less easy when you have to face the material world.

Moreover "the internet", whatever the meaning, is not a faithful representation of the "real world". Go tell the millions of people without toilets or working the whole day the slacktivists spending their days on twitter represent their struggle...