My job regularly requires google searches for research. I go lots of sites, but always with a business purpose. At lunch I hit Yahoo for personal e-mail, and then hit economic blogs. I would not touch any remotely questionable sites from work. That is what the home computer is for.
FYI, years ago, during a downturn, my former employer rolled out internet access for everyone. There were mass e-mails about being wise in how it was used. Then suddenly 30 people were fired for inappropriate usage. Do NOT make yourself an easy target for lowering the headcount.
Winton