If only I still had my Lenovo S10 netbook from 2009 to bring in, I totally would. But if they can't get me a machine to do my job, I am concerned about my paycheck showing up.
Show up on Monday without a computer. When asked, explain that they're the employer, its standard to pay for a work machine for me, and that its downright pathetic that they can't or won't.
Yes, I'd call them out. It's clearly a power move, and I'd put it right back to them. Pathetic.