Subject: is cheese mold detrimental to your health?

My son who is 16 years old keeps throwing out the commercially 
prepared cheddar or swiss cheese from our refridgerator because it 
develops a blue mould after 5-6 days.  I understand some mould is 
introduced to give cheeses, such as Gorgonzola or Stilton, flavor.  My 
question deals with: may we still eat the cheese by just slicing the 
mould off. Are most of these moulds a variety of penicillum?  Also, 
are these moulds unhealthy to eat?  Even though scrapped off, is the a 
possibilty on other food contamination in the refridgerator?  I am 60 
years old and I have been scraping mould off for a long time without 
any negative incident.  Are consumers affected?  My goal is not to 
have my son waste good cheesse.  He, though, needs an authoritative 
explanation.  So do I.

Re: is cheese mold detrimental to your health?