There is always likely to be a certain amount of selection bias in any consultation. However I wonder if the blight is caused by a small minority of otherwise non-law abiding DGAFs. Once one of them dumps their private property on the pavement and nothing happens the OLAs quickly follow. Some/many/most of who would rather a level playing field where everyone has to park considerately.
I realise it's a completely different level of inhumanity but I'm reminded of stories coming from SA after apartheid was abolished. Beforehand most of the whites knew deep down that it was wrong but the risks of speaking out were huge. This meant that post abolition support for apartheid disappeared almost overnight.