Talks to Watch

Why Web Filters Don't Work: Penistone and the Scunthorpe Problem

3.6M views · Jun 6, 2016 · 3:37 · 2 HN recommenders · 4 mentions · discussed 2017–2026

Tom Scott visits Penistone to explain the Scunthorpe problem, showing why naive web and profanity filters block innocent words.

Why Hacker News points people here: The go-to explainer whenever content filters wrongly flag innocent words, well made and short.

“He talks about how it's impossible to implement with all edge-cases, easy to circumvent”HN comment, 2020

What Hacker News said 4

RecommendscolemannugentApr 2017

“It's well done, like the rest of his content.”

Tom Scott on why web filters fail

Full comment

Tom Scott did a video on this: Why Web Filters Don't Work: Penistone and the Scunthorpe Problem - this video It's well done, like the rest of his content.

Recommendsthepete2May 2020

“He talks about how it's impossible to implement with all edge-cases, easy to circumvent”

Why profanity filtering has edge cases and is easy to circumvent

Full comment

There is a video [0] about this censoring-"problem" by Youtuber Tom Scott. He talks about how it's impossible to implement with all edge-cases, easy to circumvent and thus usually not a good idea. Fittingly, the video is filmed in Peniston. [0] this video

in “Scunthorpe Sans – a self-censoring font” · view on HN
Cites itCrosseye_JackMar 2021

“Penistone and Scunthorpe and now Memphis.”

The Scunthorpe problem applied to Twitter moderation

Full comment

Penistone and Scunthorpe and now Memphis. this video As much as I dislike Twitter (I only really use it for work reasons) they are in a no win situation. They either moderate what people post with a flawed system that will never be 100% or be hounded by the "Why won't anyone think of the children" group.

in “Tweeting “Memphis” autolocks your Twitter account” · view on HN
Cites itvarun_chAug 2026

“kinda eerie to watch now with today”

Tom Scott video that feels eerie in the LLM era

Full comment

With Tom Scott in particular, there’s a number of his videos that are kinda eerie to watch now with today’s LLM context eg. this video

in “Guiding Ships with Moire Patterns” · view on HN