Like I said before, I almost always tell the pax, "awesome ride! 5 stars for you!" even if they weren't the best behaved. I also click the 5 stars as they're getting out. If I didn't mean it at all, I wait till they're all out, and change the rating before going back online. My rating has actually really gone up since I discovered that trick. Hey, if uber can lie to us, we can tell a little fib to our pax to keep things in our favor...