This is probably the most ridiculous post that I have ever read. If it's not hurting you then why are you so worried about it. Yes, it is a bad habit, but no one is craming it down your throat. I have seen much worse things over the years, than to worry about a person chewing and spitting in a bottle. For instance, (1) a coach arguing with a ref, so lets just teach the kids to disrespect the ref, and to tell everyone how he got screwed. (2) a child who loses, and throws his/her head gear or punches the mat. (3) how about a coach/parent that cusses. (4) my son was recently wrestling, and his opponents coach was yelling,"ruff him up!" Come on, my son is 10 years old! (5)Parents yelling and screaming on the side of the mat, when asked several times to sit down, because it is actually affecting someone else, you know the people who can't see because they are actually sitting up in the stands where they are supposed to be. You know, "obeying the rules."
I think that people really need to pick their battles more carefully. I know that our coaches volunteer their time, and most of the time don't get a break to eat, let alone go outside to chew. I don't think that I would want to be around a coach, who has volunteered their whole day to coach my son, and not let him get a fix from chew.
I chose my battles wisely, and this is not one of them. Those who have the time to go around and try to find everyone who is chewing, to try to get them kicked out obviously don't have enough on their plate during the tournaments.