"Hi, we're the Federation. We're going to come in and break your laws while telling you how much we respect your sovereignty and then bugger off before you can do anything about it. Because we're just so advanced and you're so primitive your laws don't apply to us."
Obviously, the Edo are not the Zog since they did attempt to apply their laws to Wesley. Just saying "I'm new in town" doesn't get you a Get of of Jail Free card.
The ship has this really cool technology that lets you talk to people from a distance. And artificially intelligent computers that could read through and summarize the laws of any culture in a matter of hours. Things like "Stepping on flowers brings death" would be flagged.
The Feds talk a good game about non-interferance but when it comes right down to it, they are, as David Gerrold says, A Cosmic Mary Worth. Of course, if they were competent we wouldn't have about half of the episodes of any of the series.