i use old teabags with teatree oil on them to stop cats pooing on my lawn, so you could reccomend this to your neighbours.
have you tried putting your cats poo in the litter tray?

__________________
You never own a cat unless the cat owns you!

I've never seen my cat poo outside, i dont know where she goes to do it so i cant do that.

you could ask your neighbours?
and at the same time let them know you will clean up any poo!
My personal concern(when cats poo in my garden)is are the offenders wormed

__________________
You never own a cat unless the cat owns you!

Don't use cat litter, get dirt and earth from outside as that is what she is used to pooing on.

Once you have got her going in a tray, you can gradually mix it with cat litter to get her used to it.

I could try that and see but when we first got her from the rescue place and had to keep her in for a month before letting her outside she had no problem going in the litter.