As a teenager in the US, it was one of my main activities, so I can believe the age. I'm not sure about how it would go in SA.
In Krugersdorp in the late 1980s? And the police were on the case - both in terms of being tech-savy enough, and not having more pressing concerns? (1)
Let's say that it's an extra-ordinary claim and we'd like a little more weight behind it.
1) http://www.saha.org.za/ecc25/ecc_under_a_state_of_emergency....
Yep, this is exactly what we did with our 8-bit machines and modems at the time.
We were global even then.
EDIT- LOL. I guess the HN downvoters have proof this isn't what we were doing back then???