> and essentially creates a coercive environment

This is the part that's wrong. CF is not creating the fact that sites are vulnerable to DDoS, and these attacks would happen even if the sites were kicked off.

If some guys are going around slashing tires, would we demand that tire repair shops not sell to them? Would we say it's blackmail because the tire shop sells to anyone, and selling tires to them "creates a coercive environment"?