No oxymoron
The ethics are the enforcement of the law. If it can't be enforced against you, it is ethical.
At least to an average lawyer...*
Cheers,
Ben
* I can personally vouch for the existence of lawyers who buck the trend.
"... I couldn't see how anyone could be educated by this self-propagating system in which people pass exams, teach others to pass exams, but nobody knows anything."
--Richard Feynman