I understand a lot of what you're saying, but the fact is that radical anything - whether it's the radical left or right, radical environmentalists, radical fem

I understand a lot of what you're saying, but the fact is that radical anything - whether it's the radical left or right, radical environmentalists, radical feminists, etc., are all ultimately trying to move their grievances and solutions into the mainstream. Just because the makers of the placard admit 'staying home' would be radical right now doesn't mean that they want it to stay that way - indeed political issues to some extent always begin as radical ideas and by definition those that are eventually accepted by a society are no longer seen as radical when they are accepted. You might try to say this is just a slippery slope argument, but they are already advocating for something they (and you) admit is radical - the only caveat is that they qualify it as being radical for now. Clearly if a few radical environmentalists 'stay home!' there isn't going to be a dent in any metric that these people swear by - staying home will only begin to affect things if many or most people do it, whether by choice or by force, and that's the kind of wholesale societal change that I find absolutely bonkers and terrifying.