How to stop your stuff being pirated or copybotted? Easy, don't sell anything.
Nothing you can do will protect against the threat of copybotting or malicious SL viewers. Thats the harsh but honest truth. No matter what permissions you set, or scripts you add, it doesn't make any difference. Why LL can block Emerald and older SL viewers but can't block copybot or ripper viewers is an interesting problem, which needs dealing with.