The people that are most likely to 'suffer' now are the ones that downloaded a ~thing~ and said 'I want to protest against Paypal'. Okay, maybe they know that this is a grey area or technically nor legal, but.. Still. They are not 'bringing down' anything on their own.
I hope you don't compare it to a mob either - it seems far too 'peaceful' for that.
Regarding 'shut down a business': What do you call it if all employees go on a strike? What if activists block a train route to stop nuclear wastage: Are they not harming the business (both by blocking the rails for other trains and by causing immense costs for everyone involved)?
While I'm not even sure I agree with the way this group tries to make a point, I DO think you should grab some colors that are not black or white..
Remember, the world is full of folks who hate other folks. Sometimes for legit reasons, sometimes for stupid reasons.
Easy. Write something. Put forward a rational, logical and coherent argument about why you disapprove of X, and publish it somewhere. Instead of just inconveniencing others with your temper tantrum, you might convince them to come around to your point of view.
One person with a sensible argument is far more powerful than a hundred thousand people with a poorly thought out chant.