Some clients send me CDs with notes saying "Please duplicate 100 copies of this CD. Will collect tomorrow morning."
What scares me is not the 100 copies, BUT the note. The note is attached to the CD with a sticky tape stuck on the CD face itself. THIS IS HIGHLY DANGEROUS. I have to remove the tape carefully. If the sticky tape is strong enough, it might peel part of the surface away. AND the the surface is where the data is.
There is a misconception that the data on the CD is in the shiny side where the laser reads. Nope! The data is on the printed side. If a tiny piece of the printed side peels off, there goes your data.