i wonder if i could use radio userland’s bugs in handling html entities in rss feeds to automatically unsubscribe the twenty or so radio users who keep pounding away at feeds that are dead. is there some localhost:5335-style url that i can force them to hit that would unsubscribe them from the feed?
assuming the decoding bug hasn’t been fixed, and all of radio’s preferences really are web-accessible, i'm sure there's all sorts of fun that could be had. (it smells like a big gaping hole in radio’s security. think you can trust all of the people you’re getting news from just because they've been reliable so far? think again.)
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There's no simple URL, since unsubscribing uses POST. A complicated script might work, depending if Radio neuters the script like it tries to. Feeds with errors are supposed to automatically be unsubscribed--unless of course those are people using Radio 7.x, and assuming that works. It's certainly a voodoo feature for the user.
I'd go with "<h1 style = 'font-size:800%; font-weight: bold; text-decoration: blink; text-transform: uppercase;'>this feed is now closed; unsubscribe before I eat your children</h1>", with dynamically generated, slightly different messages, so they show up in every scan.