I do. I once purchased something and when I took the lid off at home the seal covering the jar was partially off and I don't think it was from me taking the lid off. Now I always take the cap off and check the seal underneath for peanut butter, mustard, ketchup etc. I also make sure the seal is still in place on jars for jams, pickles, things like that. If I notice a popped seal on a jar, I take it up to an employee. This has happened a couple of times. I'm concerned that someone may not look good enough and purchase and use the item. Do you do the same or is it just me?