In a way I can support them blocking the cameras. If they dont want to be filmed, I can understand that. But them actively going after people who film them, threaten them, dox authors of channels, slash tires on their cars, post articles on itsgoingdown about reporters... That shit is too far.

Its one thing if you dont want to give interview to some outlet. Its completely something else if you want to intimidate reporters.

I know of few people who were harassed by antifa for simply reporting on them.

One channel is Very Fake News.
I heard what they did to author of it in video: Patreon supports Antifa despite deleting Wife With a Purpose on Hate Speech on channel LAWereWolf Entertainment at 1:30
https://youtu.be/iSnuCb6m2RE?t=1m31s

I think this could same guy (but I am not sure about that) than in video: Behind Enemy Lines; Project Antifa Part 1 on channel: KPikklefield
https://youtu.be/vG_VE-pcAsg
Seems that this guy was doxed because he attended Clantons court hearing.

Third in this cameraguy in Portland who was attacked, beaten, and his equipment was all destroyed/stolen. I dont know what his channel is or what outlet he works. You can see him in video titled: Bruised Cameraman, Stolen #MAGA Hats, & Weinstein Talks #Portland by Duerst The Wuerst
https://www.youtube.com/watch?v=jLVos-BPklE

I am afraid that more violent antifa tries to be, and more of them that get arrested, more angry they will be on people who record them. So my advice for you guys is, keep is to either wear helmets and running shoes or dress like them so you can go undercover and not get recognized. One clever thing I have seen cops are doing, is having point and shoot camera mounted on monopod, so you can raise it higher than they can block it with signs and flags.