I signed up and tried it out. The "Public" thing on the right side apparently can't be shut off. About every third toot has four-letter words. Racism, sexually inappropriate comments, politics, you get to see it all. I don't see that working.
I make an effort to moderate the worst, i.e. hate speech, spam and vandalism should not stay on the public timeline for long (who disagrees with my policies is welcome to start their own instance). If I've missed something please let me know @Gargron@mastodon.social or per e-mail eugen@zeonfederated.com. A "report" feature is in the works in the next few days.