Stroller theft?

[brewso.livejournal.com]

I will be a mama soon (!), and we recently purchased a relatively pricey new stroller. I am wondering about bringing it to places like Davis Square businesses and leaving it outside. I feel like I will be constantly worried about it. My thinking is that bikes get stolen all the time, even when they're locked - why not strollers? Some of them are worth more than the average bike. What do you all think? Should I lock it? Has anyone ever locked their stroller? Has anyone ever heard of a stroller being stolen around here? Am I just being paranoid?