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

Why Web Filters Don't Work: Penistone and the Scunthorpe Problem on HackerTube: recommended by 2 Hacker News commenters across 2 separate months, 2017–2026.

Tom Scott

explainer · evergreen

Open on YouTube

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

Why Hacker News recommends it

The go-to explainer whenever content filters wrongly flag innocent words, well made and short.

people recommended it
2
separate months
2
strong recommendations
0
discussed on HN
2017–2026
“He talks about how it's impossible to implement with all edge-cases, easy to circumvent”
— thepete2, May 2020, in “Scunthorpe Sans – a self-censoring font”

What HN commenters said

4 Hacker News comments link this video. Each one links back to its thread.

thepete2May 2020Recommends

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

colemannugentApr 2017Recommends

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.

in “Scunthorpe Problem” · View on HN

varun_chAug 2026Cites it

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

Crosseye_JackMar 2021Cites it

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

Topics & tags

Free speech, censorship & civil libertiesSoftware architecture & designscunthorpe problemprofanity filterscensorshiptom scottmoderation