Covering something up is not bad faith. PR firms do it all the time (though plenty more do things in bad faith too). If what you're covering up is an explicitly user-hostile decision then maybe that's bad faith if what you're trying to do is trick people. But if you're just lying for brownie points then that's not always bad faith, just dumb.

Hiding something to manipulate public perception is bad faith.

I don't agree with your definition here. Good faith means trying to be correct but potentially not being by accident. Intentionally lying is bad faith and by definition trying to trick people; you know the truth is one thing, but you're saying something else to try to get them to believe it.