TS - sounds like what I do here at work. I have another "tab" open to an innocuous I.T. related site (today it's Configuring Windows Firewall...).

I switch back and forth as folks walk by.

I am allowed some "morale" time on the system, but if I have the same page open for hours - even if I haven't accessed/updated the page for teh entire time - I'll become the object of his displeasure.