For Washer & Dryer, they will tell you your range outlet is ok - they won't tell you it voids the manufacturer's warranty. Anything for a sale.
Update: For laptop - they are trying to be the Apple Store. I showed up to pick up my laptop, with my baby as a new mother - and the little geek was like "You need to make an appointment and come back." He sent me away with a Go Eff Yourself attitude just because he thought he could. So I stood there - and had to demand they return my laptop - where other customers were looking on. Tacky, awkward, unprofessional.