There was a Secret Origin story where a young (20 yrs) Bruce Wayne applied for the FBI training program, and ditched it after six weeks.
I'll write down the exact quote -
"During that time, he'd learned much about writing reports, obeying regulations, analysing statistics, and dressing neatly ... and nothing else."
"The experience confirmed a suspicion he'd long had: he could not operate within a system."
"People who caused other people to fall did not recognise systems."
"He left for Korea that night."
I think that pretty much sums up Batman's attitude towards something like the Registration Act.
