It is NOT ok to door-step people aggressively, knocking on their doors uninvited, pressuring them to agree with a particular stance,
It is absolutely ok to canvas or cold call, it happens every day.
Do you have a link to footage of them being aggressive on anyone's doorstep, or pressuring anyone into anything? Or have you made that up?
And even if they were, what would be the point? To get them to accept a leaflet that'll go directly in the bin once the door closes?
and then taking note of their personal details if they don't.
Writing down the door numbers of houses who don't answer, or that you don't want to return to, is done by every canvasser, salesman or charity mugger.
There's nothing to suggest that anything untoward is happening in that regard.