Reply To: Is it muttar to block illegal driveways?

Maybe that person is in violation of halacha by virtue of Dina Demalchusa Dina. But he has been accessing his property, and has a chazakah of doing so for a long period of time. May I block him?
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If ddmd applies then how can he have established a chazaka . I dont believe a chazaka can be established if it was done through an avaira, ie: ddmd.