Uh. No. Privacy laws and laws passed in response to identity theft prevent just any old munchkin from seeing your records.
Just did a very quick (and very incomplete) search of the Massachusetts Dept of Vital Records website and it looks like you're incorrect.On the form through which you order a record by mail it asks for your name and mailing address but I see no requirement to state your "relationship" to the person whose record you're ordering.
I know that that *used* to be the case a few years back because I did it.I saw the official records of...and got copies of them....people to whom I had *no* legal or familial connection (don't ask why....it's a long story).
If you wish to and are able to...point me to the place where it says only certain "classes" of people can see a person's records.