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A comment on You know how HTTP GET requests are meant to be idempotent?. Parent comment

Re:You know how HTTP GET requests are meant to be idempotent? by amatheus on Tuesday May 01, 2018 @08:10AM (#16966320)
If the unsubscribe link were unique for each subscriber would the law still be satisfied?
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Re:You know how HTTP GET requests are meant to be idempotent? by jimktrains2 on Tuesday May 01, 2018 @08:34AM (#16966466)
I don't understand how that prevents an automated system from unsubscribing them?
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Re:You know how HTTP GET requests are meant to be idempotent? by wlll on Tuesday May 01, 2018 @08:37AM (#16966488)
I thought that initially, but then I considered that for users to be bulk unsubscribed then the link would surely have to be the same for every user, at which point the each user gets the same unsubscribe link, and then when they click on it it unsubscribes everyone.

This doesn't seem very likely, so I guess that a whole load of unique unsubscribe links got dumped into slack which started following them.

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