It occurs to me that when I was doing long trips as a kid in the early '90s - several of them longer than 90 days even spanning up to nearly a year - I think I was totally unaware of a 90-day limit, and no one gave me any problem coming or going.
Where the rules different, or were the border officials noticing that I'd done something wrong and deciding that I was just some dumb kid and they let me go home on my merry way?
Thanks