writes "The longest running Public Access UNIX System (SDF, running BSD) est. 1989 had their services terminated abruptly by NWLink because of a DDoS attack. Termination was carried out immediately without prior notification, which violates their contract (page1, page2). Complaints can be filed to the Washington State Attorney General's Office by filling out this simple form conveniently located online. You can follow the story at lonestar.org."
While still bad, I've been corrected - SDF was *not* the longest running public access Unix - ArborNet
(Located right here in my town) has been around for at least a number more years.