Yelp built an AI system to identify spam and inappropriate photos

Malicious actors are constantly finding ways to circumvent platforms’ policies and game their systems — and 2020 was no exception. According to online harassment tracker L1ght, in the first few weeks of the pandemic, there was a 40% increase in toxicity on popular gaming services including Discord. Anti-fraud experts saw a rise in various types of fraud last year across online platforms, including bank and insurance fraud. And from March 2020 to April 2020, IBM observed a more than 6,000% increase in COVID-19-related spam.

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