I think thats a good idea, but the second boat that we pulled out yesterday flipped us off and said "Fuck you we'll go where we want!" right before they went through and after we had pointed right. No matter what happens, people are still going to do what they want.
Was this the purple aire? We picked up one of their paddles down river and returned at takeout and they seemed appreciative, but also somewhat nonchalant about dumping everyone.