Vault at one point announced "ProLock PLUS",
which s'posedly would unleash
malicious actions, such as >formatting, if it
detected an unauthorized copy.
Public reaction was strong enough that not one >single copy was ever sold;
companies that had used the previous version made public announcements >that
they did NOT use the new one and changed suppliers.
A bit off topic but CD-ROMs (mostly games) began using malicious copy
protection when every Joe Blow could copy a CD with a standard CD-RW drive.
Now what you may consider malicious may differ from my definition of
malicious but any copy protection that causes a HA for the end user, IMHO,
is malicious. Products like SecureROM and StarForce definitely pushed the
envelope in the user convenience vs. developer protection space.
Of course the worst offender of all is online activation. Now you are at the
beck and call of the company, its servers, and its fortune (e.g. for us
vintage folks what happens when a company goes bankrupt or takes their
activation servers offline?).
-Ali