Evading Profanity Filters Using Bi-Directional Text
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There are some very sensitive souls on the Internet who object to seeing swear words. To that end, a huge industry has sprung up around "Profanity Filters" - services which claim to be able to detect naughty words and automatically redact them. The approach of dumbly looking for strings of text leads to a range of problems, including false positives (known colloquially as the Scunthorpe Problem). A common way to bypass these filters is to use homoglyphs - substituting a lower-case L for an…
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