"Cancelling" is more about people in the public eye. Pressure groups use bullying and boycotts as a way to keep celebrities and companies saying the right thing and demonstrating the right virtues (however shallowly). If you don't have a public profile you don't really need to worry about it. That said I think it does have a bleed on effect to regular people. It creates an atmosphere of fear around exploring certain topics in any meaningful way. Most people just want an easy life so will parrot the "correct" opinions whether they have really though about it or not.