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I'm looking for a way to add bad sectors into a video DVD (and it can still be playable on home DVD players), or a manual way using multiple softwares or using Hex editors etc.
I know a lot (not everything) about IFO, VOB and BUP files and the structure a video DVD can have. also about using Hex Editors and how to detect File Types, File Size, Start and End Location of Files on disks using Hex editors.
Note: I can copy almost all kind of disc protections so I know bad sectors and all other kind of protections can be bypassed easily. I don't want to protect my discs, just want to find a way to add bad sectors and leave a ring on disc so beginner computer users can not copy the contents. I also don't want to use a needle or sledgehammer.
Edit: I chose @Igb answer (comments section) as answer to my question because it set me on a good path, and somehow all of the answers were correct because there is no method to do bad sectors that anyone know of, and all methods are used in closed-source programs.
1well, it was a copy protection technique for consoles... a bad one. – Keltari – 2018-12-17T11:42:31.523