Commenting on internet forums and engaging in debate is at least better than clicking "like". In terms of conversation, the "like" button is DH3, where comments

Commenting on internet forums and engaging in debate is at least better than clicking "like". In terms of conversation, the "like" button is DH3, where comments and debate can potentially be DH4 or higher (http://www.paulgraham.com/disagree.html http://www.paulgraham.com/disagree.html). If I "like" a support page about marriage equality, I'm not convincing anyone who holds an opposing view. That's not necessarily true of commenting on e.g. HN. Of course, commenting does nothing for many issues, such as those requiring money, but a comment can be marginally better than a "like".