there's no way for you, or BB to tell by physical examination of the DVds, but those of a paranoid disposition should note that is it technically possibel for a DVD, or a clone of it, it "call home".
and because a clone made by dvdfab is not an exact copy ( as discovered by fans of clearplay software) it is technically possible for the software on the other end of a call to work out that it's a clone calling. AFAIK know this has never been done for real, (so file under lone gunman/grassy knoll/etc conpsiracy theories )
any DVd which contains additional software that is activated by autorun as soon as the dvd is placed in a PC drive, coudl launch a program to call home, or even one to trash your system. ( i.e. you could make a malicious copy of a DVD which would auto-install a virus , or which had a format drive script)
Some Sony & Disney Dvds use autorun software though it's mostly harmless, just annoying.
It's safer to disable autorun on all removable & optical drives, and to only rip reputable retail DVDs
For more info google interactual spyware.