I came across a thread on another BDSM site that presented this scenario:

1. Submissive enters into no holds barred/no limits M/s relationship.
2. Dominant gives command that submissive is very strongly against doing.
3. Dominant proceeds to issue corporal punishment.
4. Submissive safewords.
5. Dominant increases intensity of punishment.

In your opinion, is this acceptable? Elaborate on why or why not.