I remember years ago reading that smoking was banned on Waikiki beach in Hawaii because of the litter it produces. Of course, they were talking about FILTER cigarette butts, and I can understand that reason. Before, when everybody smoked straights, there was no problem because unfiltered cigarettes (and pipe tobacco) are biodegradable and are soon disappeared.
As for tobacco juice, I have chewed/dipped for 45 years, even longer than I've smoked a pipe. At home, my favorite spit receptacle is a dark brown stoneware tankard that I empty in the toilet and rinse out daily. When driving, I usually use an 18oz plastic cup ("Solo" or the like) which just fits my drink holder recesses. When I'm driving with others or visiting, my favorite spit cup is an empty 12oz. "Quik" chocolate milk bottle. The plastic material (and plastic label) is opaque (to avoid people SEEING the result of my Skoal enjoyment), and has a nice tight fitting screw-on lid that eliminates turn-over accidents and aromas. It is washable and reusable. Nobody can claim they are disgusted with seeing/smelling it. I DO defer to others and hesitate lighting a pipe in company, but they have no logical argument when I'm using smokeless tobacco.
BTW, I have tried those "dissolving" pressed powdered tobac "pills" like Stonewall when I don't feel right smoking or dipping. One held in the cheek lasts for hours, and there's NO SPITTING. You can "sneak" your tobac in otherwise prohibited places!
When it comes to "disgusting", I can't think of anything as foul and odorous as a used pipe cleaner. I deposit mine in the lidded kitchen waste basket which is emptied several times a week.