Can expired velveeta cheese hurt you?

Ok, according to their website, that is a "sell by" or "best by" date for the highest quality not an expiration date.

I found this on one of the food safety sites:

Shelf Stable Foods

Before opening, shelf stable foods should be safe unless the can or packaging has been damaged. After opening, store products in tightly closed containers. The storage of many shelf stable items at room temperature is a quality issue - unless the product is contaminated (bugs in flour, for example).