Is it legal to keep a digital copy of a birth certificate for family genealogy and records purposes?

I notice a 'small print' on many birth certificates that it's illegal to make a copy or use the birth certificate for any illegal purpose ... certainly it's o.k. to keep a digital copy as part of family history or genealogy records, no?Is it legal to keep a digital copy of a birth certificate for family genealogy and records purposes?
Genealogy is not an illegal activity, therefore there is nothing wrong with digital copies, other than serious most researchers, still want paper copies of record. Some counties charge less for copies of documents if they are for genealogy research and stamp them as such.Is it legal to keep a digital copy of a birth certificate for family genealogy and records purposes?
try this one..

http://www.youtube.com/watch?v=WiD8ecGYI鈥?/a>