I don't just mean outrage or regular rage, I mean shock that someone was to the left of "legal weed and free college but only for those that operate a successful business for 3 years in a disadvantaged community" 
takes.
I think federating took them by surprise, looking back. For about a week, those smug liberals were at a loss to even fathom what Hexbears were saying, and could only chant bullshit about how we're Russian/Chinese bots.
Sure they still do that but they've slightly adapted to Hexbear presence.
Listen to Teach Me Communism! It's the podcast that turned me into a leftist.
It's a nonbinary person and their brother basically doing a book club every week and explaining a different piece of socialist literature or socialist history. They start from square zero (the manifesto), work their way through stuff like The State and Revolution, and do a toooon of history. Also they've done the podcast for the past 3 years, do it entirely for free, and donate all of the money from their Patreon to a local Dallas mutual aid fund. I have such an unhealthy parasocial relationship with them but I'm an ML now and love them (though they do a lot of anarchist stuff too).
Really wish more people would suggest them more!!