No, two PCs is much smarter. Use /etc/hosts to block access to the sites that yo...

No, two PCs is much smarter. Use /etc/hosts to block access to the sites that you shouldn't be seeing on one machine to the other.

One PC, two accounts, breaks for some things, like Flash cookies, etc.

The other alternative is running a "clean" VM inside the "dirty" machine. But that's again likely to cause issues.