We certainly don't want to cause any trouble for anybody. And it's for that reason that I asked the question. If it's dangerous and not real smart, then we'll encourage them to get in the raft when we go through some of the more difficult stuff. But, when the water is slow moving, there is really no reason to say that people are stupid. Yes, they are stupid if they carelessly go forward with something that is clearly dangerous but you should never be stupid if your asking a legitamate question in hopes of getting a answer that will benefit the group as well as fellow boaters.
So, thank you for your insight and we will use EXTREME caution with tubers.
Thanks everybody else too! Good responses. Gives us an idea of what to expect. We'd rather not have anybody killed. We want to have a party on the river, not a funeral!