I'm an absurd poster. 8) They've been marching right where our hotel is, and I was going to be taking my 75 year old mother, who has difficulty with unplanned issues anyway. There have been some street fires, hydrants opened, and a coordinated smoke bomb "attack" on the subway, which shut it down temporarily a couple of weeks ago. I don't have unlimited cash, so I just felt it was better to cancel/postpone until later, when things settle down. Otherwise, I feel I'd be paying $$ to miss out on exhibits or museums or other tourist sites I wanted to see.
Hotel bookings have dropped 10% because of the protests. That's one measure that might make you feel more or less inclined to go.