Mastodon CEO Eugen Rochko has spoken out about the significant moderation changes announced by Meta on Tuesday, which will see the social networking giant removing fact-checking across its apps in favor of a crowdsourced community notes feature, similar to Xs. The Mastodon founder, whose app competes with X and Metas X rival, Instagram Threads, called Metas changes deeply troubling and a concern to anyone with a conscience. He also warned Threads users who cross-post from Threads to Mastodon via Threads fediverse-sharing feature that Mastodon will take action on hate speech and any Threads account violating Mastodons existing policies.Following the announcement of Metas loosened content moderation rules, which affect LGBTQ communities and other marginalized users, many Mastodon users wanted to know what this meant for the open source, decentralized social network, given its connection with Threads.Last June, Meta opened up its fediverse-sharing feature to all Threads users after earlier beta testing in the U.S., Canada, and Japan. The feature lets Threads users enable an option that will publish their posts directly on Mastodon as well, allowing them to reach a broader audience. ScreenshotRochko previously touted Threads federation, saying the move made the open source Mastodon a far more attractive option. He has also spoken about how Metas adoption of the underlying ActivityPub protocol, which powers Mastodon and other federated servers, was a validation of the move to decentralized social media.However, not all in the fediverse are in universal agreement on Mastodons integration with Threads. Hundreds of smaller Mastodon servers block Threads, which means their users cant connect with Threads users or vice versa. (Meta also blocks hundreds of Mastodon servers, too, over violations of Community Standards and other moderation and privacy issues.)It was previously unclear how Mastodon would respond to Metas new policy, and whether or not the larger Mastodon instances, like mastodon.social, would now take action against Threads accounts.Rochkos post indicates the organization is aware that Threads integration could soon become a moderation challenge. Hate speech is prohibited, and we will take action on any Threads account found violating our policies, he warned in a post on his Mastodon account.He also urged users on Threads who disagreed with Metas new direction to move to Mastodon instead, though its not as easy to do as moving an account between different Mastodon servers. Thats because Threads is not yet fully integrated with the fediverse in this way.