I feed my cats an "indoor" pet food and rexuces the smells of their waste. I also spent months finding a litter that reduced the smells. That was key as some I swear amplified the smells (crystals).
Doritos dont require refridgeration or equipment to cook them. They remain edible for a long time as long as you roll down the open end. They are easy to carry, easy to hide in case someone else plans on taking them. Also they are cheap. People are more willing to give up a few dollars.
Are they brushing in the bathrooms, where people wash their hands after using the toilet? Do they leave their toothbrushing kit in the bathroom? People who brush their teeth like this are nasty.
Oh I agree with what you're saying and upvoted your comment, But what I am saying is that we have had long standing potable water supply issues that have been around long before PCs where even a thing.
How can any 12 year old have the cognitive maturity to consent no matter where they are from?