Technical question for any and all DRM providers ...
When the file is "packaged" with the licensing technology -- aka the WMV file modified -- does that in any way prevent other software or scripts from a) making a thumb from a screen cap via automated software or scripts or server modules or

in any other way alter the header or anything such that other programs/scripts can no longer recognize, read the file in terms of site publishing?
Just something I've wondered for a while now and which no one's FAQs address.