[SATLUG] Would modifying hosts file affect DNS entries?

[Eric Haugen]

I am trying to keep "some" users from going to time/bandwidth wasting
websites and I know you can add entries such as:

127.0.0.1     www.youtube.com
127.0.0.1     www.pandora.com
127.0.0.1     www.myspace.com
127.0.0.1     www.ebay.com

to the hosts file.  When I  told another administrator at work what I wanted
to do he said not to because it would screw up the DNS.  Is this true?  I
couldn't see how because it would only be on the users local machine would
query the file.  Blocking these sites at the firewall/DNS server is not an
option because there are some users with legitimate reasons to go to these
sites.

Thoughts?

- Eric