No, VHS tapes are not difficult to take apart. I have been doing this for years
with U-Matics and VHS to reattach loose ends to spindles and splice out chewed-up
sections at the ends of damaged tapes.
Although we have not experienced this type of vandalism with our media collection,
I can think of two inexpensive(?), albiet tedious and time-consuming, suggestions.
1. Loosen two of the screws in the video case one or two turns, apply a drop of
(perish the thought) "super glue," and tighten each screw after the glue is
applied. While this may not prevent someone's successfully taking the case apart,
it should make the effort much more difficult.
2. Fill two of the wells where the screws are located with epoxy, "construction
cement," or other glue that cohres well so that the screws are not accessible.
Hope this helps,
Gail B. Fedak
Instructional Media Resources
Middle Tennessee State University
Murfreesboro, TN 37132