You betcha - it even mentions it in the article.
Lurking’
Hate to say it, but a company has a right to do this, it’s their property you’re using for other than needs of the business.
Now that isn’t to say that everything should be held against you and the networks Nazi’s should come knocking as soon as you open FR, a majority of companies aren’t going to waste their time with minor things, they’re looking for evidence of improper use, such as porn, job hunting, and such
Just remember, don’t do anything on your computer you wouldn’t want put on the front page of the NYT. ;)