A co-worker and myself stumbled across this really scary possibility while troubleshooting WPDM:

We use WPDM so we work with Read-Only files quite often. When a RO files is open if you click on Save it immediately brings up the Save As dialog if you don't rename and click Save a warning pops-up telling you that the file is Read-Only and ask you if you want to Overwrite it, usually by this time one realizes that that would be a "not so smart" thing to do, but by accident we clicked Yes and it happened SolidWorks actually just overwrote a Read-Only document. We tried to duplicate this behavior on every other software on my computer and even the ones that give a similar "warning message" for overwriting, if you clicked Yes a second warning message appears telling you "you dummy that's impossible"!

Why in the world would SW allow this? this defeats the purpose of using WPDM, WTF???