I know a few who do that also. I don't do it but I don't see what the issue is either. As stated in several posts; to each their own. I don't see it any differently than adding mixers to alcohol drinks, cream and sugar to coffee, and so on. I don't do those adulterations either, and neither as well do they bother me. I see no reason to care why and how people pursue their own unobtrusive enjoyment.