OTOH there was the PDP10, the ITS and Emacs with the policy of keeping everyting open and readable from anyone to anyone, the ultimate hacker's machine so every

OTOH there was the PDP10, the ITS and Emacs with the policy of keeping everyting open and readable from anyone to anyone, the ultimate hacker's machine so everyone could contribute with cool things. The lack of "mistery" kept potential crackers away because when you are a teen there's no pride on entering an already open system. On Usenet, adding googlegrups to a killfile blocks the 90% of the pests out there. SLRN will happily purge all the SPAM before entering the thread list.