If you have such special condition at the first place, dont you think you should go proper means to take proper care of yourself such as tailor made clothes? isnt it kind of obvious? If you have such a problem and stubbornly try the product, insisting all product should be brand new when you try it, I am sorry but this is outright selfish. Remember, for one single t-shirt, before you want to try it on, you might want to consider that a lot people have tried it before.
Yeah, that comment sort of shows your ignorance on how common that is. A piece of dog or cat hair is easily inhaled off a piece of clothing when someone tries it on. In some cases this sends people to the ER. This obviously isn't as big of a problem with lenses, but in some cases there are still issues. A family member has a severe allergy to black mold. If she gets near it, she has seizures. She avoids used book stores, garage sales, laundromats, etc. She's had problems with clothes that she later found out were returned.
There are a lot of folks out there with all kinds of issues that may seem strange to the regular SUV-driving male with gelled hair and a Burger King Whopper in his mouth. Severe allergies are common. Remember, not everyone wants what has been in your house.