Probably 1% of people did that, but they're visible and good for headlines.
There has clearly been a gradual erosion of caution, call it fatigue, among the general population which is the main source of problems. In spring most people were quite serious about following the rules; a minority flouted them but cases came right down. In autumn, a minority flouted them but many more just weren't being strict any more.
Somehow the population needs to be motivated to follow the rules again. Fear of fines seems a poor motivation, you only have to look at how many people speed when driving.
Fatigue? With what? The constant lies that have been exposed as a total economy destroying overreaction, where the cure is far far worse than a disease which on average kills people who are older than the average life expectancy.
People are not cautious when they realise there is nothing to fear for 99.7% of us. But yeah, lets keep locking down to give that 0.3% a few more months of life.