

Protesting is legal.
You are describing a chilling effect. Those weapons are not used at all protests and that is the point. They want you think twice before going to protest. Still though, in general, it’s not criminal to attend or organize a protest.
It’s good that you and everyone here knows that these things are happening. If the twitter post was just speaking to the choir, then what’s the point? Circle jerk to make us feel better? Retweets and upvotes aren’t going to save us.
If the post is trying to reach people and wake them up, then they are speaking to people who are not aware of the story you cited. To them it just seems like OP is lying and the post does nothing to help anything.

Really wish people realized this 20 years ago when we actually had a chance to stop it.
Everyone sounding the alarms over the past two decades ago were ridiculed. Arguments seen as over reacting or a “my brand vs your brand” thing (really about the infrastructure and consumer rights).