It's not too hard to eradicate them from your neighbourhood. Make friends with them and get them to drop in from time to time for a feed. Then crush a few panadol into their sardines. When they have finished their meal, make a big scary noise and they will run away to die somewhere else. This works and is apparently more humane than snail baits (also effective).
Repeat this process to its natural conclusion and you will notice native birds, lizards and other small fauna return to your neighbourhood.
If you own a cat and you are worried that you may live in my neighbourhood, keep it neutered and inside and I can guarantee its safety. (Bells do not work unless they weigh over 1kg.)
"Free Cat" -- I'm still laughing.
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