What are strategies for preventing the theft of your luggage during airport security screening?
An older friend is considering respectfully "opting out" of full-body scanning during her next trip to the airport. We've been debating the ethical and political reasons behind this (which I'm not interested in replicating here); one of her concerns, however, is that she won't be able to watch her things (purse, bags, shoes, coat, laptop-sleeve) if her decision results in a delay, and that they might thus be stolen. I'm personally not worried about this because it doesn't seem that theft is much more likely under these circumstances than it usually is at airports, but she's read some accounts of stolen baggage that have her worried.
(I understand that sometimes this isn't an issue, as some TSA agents will give you a pat-down/wand in right in line with your consent, or she might be lucky enough to get in a line that isn't using the full-body scanners. Let's assume the situation doesn't happen to be the case.)
What are some strategies she can use to reduce her fear of theft, or prevent theft, during opt-out? I suspect asking the agents to watch her things complicates their job unnecessarily, and might even get her stuff given a special go-through.
I haven't had any great ideas for her outside of using bright pink accessories and luggage locks, but she's concerned about obvious temptations to thievery like her purse and laptop sleeve.
For those interested, here's a related question
about the opt-out procedure and one about stolen luggage