Outside of movies these antics were confined to a specific (wealthy, male, usually white) demographic, though. Likewise a lot of 80s movies happily depict "funny" antics that would even at the time have been considered sexual assault or rape if the perps weren't wealthy white college "boys".

Sure, culture has become more sensitive to these things overall and criminal prosecution of credit card fraud and computer crimes has become a lot more effective but there's a tangible difference between generating fake credit card numbers and masking your identity to defraud ISPs and hacking the Pentagon to access government secrets (namely, the latter fits into the hacker ethos of "liberating information" and rejecting authority whereas the former just provides personal gain). Changing your school records as a student is a childish version of the latter (as the intent is not to create false credentials for monetary gain but to defy the authority of teachers by subverting their means of "punishment").