These threads always go the same way.
Posters either believe that
A. Cat owners should take equal responsibility for their pets as they would any other pets they own. This includes taking precautions to prevent their pet from becoming a nuisance or a danger to anyone else.
B. Cat owners who believe they should not take responsibility for what their pet does outside their homes. These cat owners will fight to the end for their cats rights, yet delegate the responsibility for cleaning up after their pets onto unsuspecting people in their neighbourhood. To these owners, cats have many rights and virtually no responsibilities, yet they have the expectation that strangers will happily behave responsibly towards their cats. 
These are the same cat owners who expect neighbours to cat proof their gardens, at what can be considerable expense, with no guarantee of success, yet do nothing to prevent their cats escaping their own garden.
It is not just a question of cat shit though. I have had cats run out in front of my car and I have had to brake hard and swerve to avoid them. On one memorable occasion, when a cat ran straight in front of my car, leaving me no time to avoid or stop, I postponed my journey to transport a cat to the vets, where the cat, which wasnt microchipped, needed treatment urgently.
Upon locating the owner, the owner screamed that they were going to sue me and proceeded to go onto my local community page, attempting to shame me into paying for the full cost of the treatment, since they had no pet insurance nor the means to pay the bill. Apparently, I was wrong to 'take it upon myself to transport their pet to the vets' without finding the owner and checking they had the means to pay.
I contributed half towards the cost of the treatment.
Within a week of this lady getting her cat home, she resumed letting him out.
He died 8 months later after being hit by a van.
I was travelling at about 25mph but when a cat runs straight into your path, you cant always avoid it.
Why should drivers have to take responsibility when these cat owners refuse to?
Why should householders pick up someone else's pets shit?
Why should cat free people pay out for modifications to keep cats out when cat owners can contain their cats in their own gardens?
All about their rights but very little about their responsibilities!