pmdubs writes: "Princeton University Professor Michael Freedman, creator of CoralCDN, discusses how he received around 100 pre-settlement letters from various copyright agencies after invalid BitTorrent tracker requests were issued through CoralCDN's proxies. Interestingly, the participating agencies made no effort whatsoever to verify that the Coral nodes were actually running BitTorrent, which they weren't! He questions just how much effort agencies take to reduce false positives when it comes to DMCA notices. Considering the credence that network operators give to such notices (they'll often cut your service upon receipt), it would seem that the answer is "not enough"."
egrep patterns are full regular expressions; it uses a fast deterministic
algorithm that sometimes needs exponential space.
-- unix manuals