Internet phones a hacking risk?

Source - http://money.cnn.com/2005/03/18/tech...ex.htm?cnn=yes
Some Internet phone services allow scam artists to make it appear that they are calling from another phone number -- a useful trick that enables them to drain credit accounts and pose as banks or other trusted authorities, online fraud experts say.
-Almost 2 years now, I am using VOIP (Phoneserve) and had been aware of such problems arising from using it like lost of minutes by sort of technical problems and other issues. The internet is getting old. And more newer tricks each day pops up and threat the cyberspace, including services rendered through it.

Internet worms that snarl online networks can render VOIP lines unusable, and experts at AT&T (Research) say VOIP conversations can be monitored or altered by outsiders.
-Worm again.

I guess Und3ertak3r's worm free internet idea that is really being prevented by BIG businesses really happening as of this moment...

What really can be done to achieve a lesser worm/viri internet or much more a lesser scam net? Since the biggest threat with developing more secured system is the identity verification in which more bad news we received everyday about BOGUS accounts or entities that phishes over cyberspace.

Yo!