The beauty of the Fediverse is that it doesn't matter if it does. There could be instances like Voat/Poal, and there could be instances like pre-Digg-exodus Reddit, and if the divide is big enough the two sides will defederate from each other and won't communicate. This is a solved problem in the microblog side of the Fediverse (Mastodon/Pleroma/Misskey/etc), where there is a huge variety of instances. Sign up on an instance whose rules and moderation you prefer, and you'll be fine.