attacking people for not taking measures to reduce the spread of disease is certainly ineffective at actually making them stop, though, and i've been saying that for a while. however it's mostly disability activists doing that in my experience, not the left more broadly
Discussion
Attacking people in general usually has them doubling down on their original behavior.
The only times I (and most people I would venture) ever change behavior are when a decent argument is made politely. Kindness and patience always win over bullying.
My broad impression of the left is that they attempt to bully others to get their way.
The right imposes their way and then acts dismisssively when objections are brought up.
There's way more to it then that obviously but that's a start.