Actually yes I do trust them to the same extent. But that's a choice I have made based on my perceived trust level. I am even OK with advertisers harvesting my photos (not sure if that is possible yet). My main desired privacy control is whether people that are not supposed to see my photos or browse through my galleries, actually get to do that. That's not necessarily a monkey business but an outcome of a privacy implementation flaw (assuming it is unintentional). That will certainly have an impact on my trust level for Facebook. The difference with instagram is that you go into instagram knowing that everything is public and so is the general sharing norm on that platform.