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dcornu

They do. The problem is that the rules of DST change over time (sometimes at the very last minute https://github.com/eggert/tz/commit/868f3528a9fd60491439ce45...) and can lead to all sorts of date math bugs when comparing timestamps across timezones.
Re:An Anomaly in the μTorrent network on Sunday May 20, 2012 @02:23PM (#3999572)
"The company doesn’t reveal how it works, but they appear to be flooding clients with fake information, masquerading as legitimate peers."

"For a month Pirate Pay’s technology protected the film “Vysotsky. Thanks to God, I’m alive,” (distributed by The Walt Disney Studios Sony Pictures Releasing company) with moderate success."

Sounds likely to me