Good example, soccertxi! I am so sorry this happened to you.
I don't like to take risks, so I at least rinse a fabric before using. If it only bleeds a little, then I rinse until the bleeding stops. If the bleeding doesn't stop after a few rinses, it gets the Retayne treatment. Red, navy, purple, and black get Retayne no matter what.
A few weeks ago I had a black piece of fabric that bled even after the Retayne treatment. It left a black waxy ring in the sink. It was discarded.
My time is too precious to me to take chances in using something without taking precautions.