dishes can be sanitized so there is no danger. The furniture at out thrift stores is very carefully screened before it ever goes in the store. Hoarders thing would not qualify. They have a big dumpster thing at the back. Anything suspect goes in there. I live in an area where there are people that redecorate often, like every couple of years. Those are things I am talking about.
I would never buy a used mattress, the thought of that makes me uncomfortable. Linens are fine if the first thing you do is put them in the wash with bleach and hot water. Most people that donate would never consider giving anything that is stained, torn or not of any use.
I take towels and blankets when they are worn out for my use to the animal shelter. They always need these things, bathing dogs and making beds that are comfy.
That changed when I became older and wiser. 
. Bedtime soon, but too full.
