It is just like any other of the 5,000 computers they see in a day. I have had a couple airport people laugh at my parties based on the number of computers/phones per individual coming out of pockets and bags, but other than that, they are great.
The only time I ever got yelled at was when I put my MPB though not in a basket. And they were only trying to warn me that it might fall off the end of the belt... I am not sure if this is just my experience lately, but it seems like everyone has really lightened up in the last 12 months as long as you do not give them a hard time about doing their job (just take off your shoes, take the computer out, don't be talking on the phone, etc).