In my local grocery store the infant formula aisle is equipped with a camera and an alarm bell that goes off if you enter the aisle. Of course, the bread is in the same aisle, so that alarm gets tripped frequently.
In another store the cold/heartburn/allergy meds (the ones that don't contain pseudoephedrine) are behind a special barrier that makes it impossible to grab more than one at a time.
Diabetic test strips are freakin' expensive! I asked the price for a box of strips, and it was $120! They keep them locked up. It's interesting that you can get the meter for free, but they screw you on the test strips.