On flights of more than 5 hours, I dip. And I do not spit into anything. It goes down like normal saliva. I load up and unload in the lav, so no one sees, no one smells.

It is a stupid habit, but like all of my stupid habits, I make sure it does not affect anyone around me. The problem is not dipping/chewing, the problem is people who do not go to lengths to make sure other people are not affected by their stupid habits