Busines Casual???

Since when does business casual mean Addidas running pants??? Seriously.

I swear every week I am shocked by at least one person's outfit. Today I discussed this over lunch with a friend and she informed me that our office is actually just casual. Fine, our office is now casual, but I still don't understand why people think that it's ok to wear sweatpants or, on the other extreme, club shirts. Perhaps I should nominate some coworkers to my favorite show.