Building and other monstrosities . Orient your tourists . Point out all buildings and explain what they are. As you make your loop and you're on a bridge, point out the other bridge. If you lie, they'll know .
Parents can smell it.
People know that college food sucks and that some people will drink. Diplomacy is good, just don't go overboard. But do remember to balance the bad with the good. Unless you KNOW a statistic, don't use 'em . Guaranteed, there will be a parent who will know them better than you do, and you'll just look bad when you get it wrong.