I just got this exploit mode message when I was killing a boss in some quest. Nothing special happened as far as I could notice. What's this message about? It was scrolling really fast and I was concentrated on the fight so I didn't read it well. And I couldn't find any info on this anywhere. Thanks!
Exploit mode is a very interesting concept IMHO. What the exploit mode does is that it prevents you from harming and killing a creature that cannot harm you at all. For example, if you're shooting arrows from some place no one can reach. System is not perfect yet and sometimes you'll get this message when you have no idea why you're getting it but I'm sure it will get better.