Just reading that, I think the key words may be public actions.
As someone mentioned sexual orientation, I'm going to harp on that one. I'm assuming (on the legality side of things) it means that simply being gay, for example, wouldn't be enough for them to act (and if they did, then you could have a case to sue). Doing something illegal (pedophilia, public exposure) would.
If I'm reading this right, the clause applies to your public life...not your private one. In other words, if you're arrested, that sort of thing then you could have an issue.
Is this sort of thing standard in book contracts?