... that it wouldn't surprise me if CM's see at least 50 strollers a day w/ that kind of decoration. By now, I'm sure any thief worth his salt is onto that one. I use a cluster of metallic gift ribbon myself; it's easy to spot because it glints in the sun, and it is hard to remove without scissors.
I have a Maclaren, and I lock it, but I don't lock the wheels, because that is so much trouble to do that I find I don't do it after awhile. What I do now is put a padlock across the one of the fold joints on the back, so it can't be folded. That way, I only have to lock it once per park. I figure that unless someone is REALLY serious about stroller stealing, they are not too likely to have a bolt cutter in the car, so they would probably abandon it in the parking lot when they discover it won't fold.
BTW, I just found a great new lock for my stroller... It is a combination lock that looks like a large carabiner, about 4 inches on the long side. The lock is on the spring latch on the short side. This means that the open area that the lock with fit around is MUCH larger than on a normal padlock. It's light and can be seen easily, and it easily fits around the stroller bars, much better than my old lock, which only fit in one specific spot. It's called a Gear.Lok, by Abstrac Products, it was $5 @ KMart.