What is abusive ?

[Tichy]

That confuses intention with execution.

At the very least, exploiting acknowledged but not yet squished bugs must be considered abusive.

At a second level, exploiting things like the Bogus copy command should be considered abusive because it is an undesired side effect to a desired feature that may just be too cumbersome to track down and rewrite. (Unless of course we hear from the devs that charming Bogus is supposed to net you a combat trainer who introduces new secret strategies in addition to his own bad self...)