you have more pay banners on your site than lines of text.
you're an hourly employee who goes in to work whenever you have something to do. (As in: not work-related)
you run a side business using the company's computers, T1 internet connection, and two phone lines
you run an ISP from the above...
you make stock trades for other people from your computer at work on an hourly basis, and your job has nothing to do with the stock market.
you sell CALL options against the stock in your 401(k) plan. (I'm not too sure if this is actually possible with a 401(k)).
you're an accountant who brokers "inside information" during business hours. (I charge a 1% commision on all capital gains made, with a minimum fee of $5.00, for more information call (900) 555-BULL)
you're selling Mary Kay, Shaklee, Tupperware, and the Pampered Chef products at work, and have placed all of the product catalogs in all fifteen breakrooms in your building.
you requested a second line at your desk (to take phone orders for these products).