There is no way to stop them from trying to get to your machine. All you can do is thwart the attempts.Any way to stop them?
If you have dynamic a IP address, you'll eventually get a new IP address and whomever gets the one you have now will suffer the fruits of your indiscretion.
If you keep yourself clean, your machine will no longer send out the Borg distress signals and you should be able to elude them.