Statists make the absurd claim "Ignorance of the law is no excuse", but that's obviously nonsense. If you aren't aware of some random, arbitrary rule made up by some ethically empty control freak, how can you be expected to act counter-intuitively and "obey" it?
Only an idiot would expect that.
Ignorance of the "law" is normal, natural, ubiquitous (even by those who worship and enforce "laws"), and it is most definitely the best excuse.
I would turn the statist's claim around.
"The law" is no excuse to molest, kidnap, rob, and murder people. The "law" is never justification to archate. And anyone who believes it is is a nasty goon.