Or maybe you're not worried at all. Maybe you're just so trusting, and so unwilling to risk losing your hard-earned table by packing up your laptop, and also you think wearing a catheter for non-medical reasons is "weird." So you head off to the powder room without a care in the world. This is like leaving a stack of hundos out in public and just trusting that no one has opposable thumbs.
The only reason laptops exist is that they're portable. You carried it to the coffee store, and you will later carry it out of the coffee store (unless you are tragically walled-in, like in "The Telltale Heart"). Thieves are not Thumbelina-sized; they are in fact the same size as you and I. We may assume that opportunistic thieves have hands -- unless both have been chopped off by an overzealous fruit market security guard. My particular laptop is a MacBook Air Mini, which weighs about as much as the coffee I'm holding. It could be easily carried off by any number of low-dexterity thieves, like a child with brittle bone disease, or someone on day five of the Master Cleanse, or a particularly determined sea bird.
That plant looks like it might be getting ideas.
The probability of theft is uncertain, but the possibility? 100 percent. It is physically possible for someone to carry off your laptop into oblivion, along with your honeymoon pictures and pirated copy of Final Draft. So why leave ourselves open to this nightmare? Instead, always bring a sweatshirt and a newspaper, use that to claim your table, and bring your foldy-robot into the bathroom with you.