(sugeneg)
Consent is not always part of the issue of abuse. Consent may be given for an activity because the sub so loves her Master that she will give consent to make him happy, but just becasue consent is given does not mean the act should still occur.
(Barton)
While I agree that a dominant should be as observant as possible to avoid problems, I think that a sub also has an obligation to be honest about limits. Any sub that would violate their limits in an effort to please a dominant is missing the point.
I couldn't agree more. I know the subbie desire to please is strong, but it is important to keep your head about you. A subbie's welfare is not expendable in light of a dominant's happiness. And I've seen some submissives (both female and male) that overextend themselves trying to please their dominants. Sure we all push ourselves a bit here and there, but that's not the same as going beyond limits that we know better than trying to make your dominant happy.

I do tend to think that a lot of that type of scenario tends to come into play more with a more insecure submissive. But then the dominant that knowingly exploits such a weakness for their own gain is just as much at fault. And I even tend to think a little more so, as they should be aware of the responsibility that lies in their own hands in that regard.

(Barton)
Honesty is essential if the relationship is to succeed. While a dominant, by the virtue of being in control, is responsible for the scene and aftercare. It is too much to also be asked to read a subs mind.
And I have to agree here as well. A submissive really does need to express themself to their dominant. If they don't... it doesn't give the dominant a whole lot to work with.