I was a highschool student in the late 89s, early 90s, and I encountered some truly awful stuff on local bbs scenes. At first, I must be ugly and a social outcast (they referred to me as "the burly Russian wrestler"). I shrugged it off, because everyone got shit. So what? Then I went to one of the parties; very few people there had met me before. I was a pretty standard looking 16 year old girl, but I felt like meat, just meat. In the space of 20 minutes, two 20something men hit on me, virtually everyone else expressed shock at my lack of hidiousness, or told me they were surprised I was actually a girl. I begged my older brother to drive me home immediately. Then I buried my former alias, and made a new male alter ego. Just because you didn't see it, doesn't mean it didn't happen.
I have no doubt the BBS world was full of creeps, and that could have been very discouraging to someone getting into computing. My point was that behavior was far more segmented away from mainstream society than (say) Reddit.