Barn cats live in barns,,,
Feral live far away from people as they do not like people.
Housecats dumped will revert to feral after 2-3 generations..
If kitties do not get used to humans at or about 5-8 weeks of age..they revert to feral...
You are adding to a peoblem instead of helping...
Get the cats altered and at least a rabies..
Otherwise, I hope like hell you get scratched up or bitten by one..
Would serve you right,,,,,
For more on ferals..go here :
alley cat allies
You are doing a diservice by not caring for them.\
You feed them, they are YOUR responsibility.....
dont matter who dumped them there or how they got there..
on your property, your are responsible.