Top House Democrats introduced a bill Thursday to make social media platforms such as Facebook and YouTube liable when they use their algorithms to recommend content that leads to physical or emotional harm, a move that would drastically change the platforms’ business model.

Rep. Frank Pallone of New Jersey, the chairman of the House Energy and Commerce Committee, joined with other Democrats to introduce the Justice Against Malicious Algorithms Act to make large social media platforms responsible for “knowingly or recklessly” using their algorithms to prioritize posts that cause harm.