Well, I always like to do a little "investigation" so I found this site from Consumer Reports (a reliable source, IMHO):
http://www.consumerreports.org/cro/a...view/index.htm
Of particular interest to me was this statement: "Avoid using liquid fabric softener on all-cotton clothing made of fleece, terry cloth, or velour. In our flammability tests, liquid fabric softener added to rinse water accelerated the burning speed of these fabrics. If you want a softener, use dryer sheets instead."
So for me, the bottom line on using dryer sheets (or anything else, for that matter) is use good judgement. There's a concept :-)