awesome post AOPiLaLa!!
You are so right.
It is so easy, to get caught up in the 'heat of the moment' and say things you didn't intend to....or think that surely everyone will see in a rushee what you do. Plus you have to consider that sometimes a girl going through rush will grab onto hope and ride it way too hard when you never intended that at all.
Something like "I really enjoyed spending time with you" might seem a little sterile, but if it keeps the rushee from getting false hopes up it's worth it.