The last cat I was involved with "stealiing" was a situation where she (cat) could be and was lured closer and closer to the car with mackerel and when she got close enough, I was able to scruff her and put her in the car fast (while i sat in passenger seat, leaned down while she ate just outside the open car door and got her). The view from the "owners" (if one wants to call them that) was blocked by trees and a fence. Is there anyway you can manage something like that? Use someone else's car, have them drive while you are low in the seat and not seen from the house? Just a thought!