Sorta off-topic, but related: that's part of the problem with exploits in general. Many fall into a gray area, all are subject to individual interpretation... unless they're willing to risk perma-ban. This thread is a great example of this: some people think taking advantage of dumb AI (boxing in a mob) is an exploit, others do not.
While others are more clear, I can think of silly, RP-based justifications for many exploits: has anyone considered that perhaps ole Harry is ghast-phobic?![]()