My understanding is this is not happening because of one time thing. What has gotten people upset is the ongoing and repetitive nature of it.
Just boosting a toot will not get you in trouble. It only happens after people have discussed with you multiple times that the person you are boosting is problematic, and you keep decide doing it anyways and keep helping that person evade blocks.
Socially it is no different than if you try to introduce an awful person to your friends. At first they will tell you that they did not like that person and to not bring them around. But if you ignore them and keep doing it anyways, you eventually put them in a position where the only way to avoid the awful person is to avoid you too.
Most of the safety problems are caused by cars, not ebikes.
This is like around some of the schools where people are trying to blame the children walking to school because people in cars are running them down. We need to stop victim blaming and go after the source of the problem, the cars and the people recklessly driving them too fast.