I'd be willing to bet that 99% of people who see a diaper sticking out of the waistband on someone's pants do not consider it kinky or perverted unless the wearer does something that is obviously perverted (such as stick a hand in the diaper, or rubbing it over pants or what not). Of course we understand it is a fetish item, but most people don't think fetish when they see an adult diaper peeking out of someone's clothing, they usually assume a medical reason and don't say anything (again unless the wearer does something obviously perverted). It all comes down to perspective as well imho.