The issue is that your statement "Abbott won't replace your sensor if it comes off your arm" is where the problem lies. Many people have had sensors replaced that have come off their arm, both on here and on many of the other groups. If it falls off due to adhesive failure with no assistance, then they replace. That's it. If they fall off because you are clumsy enough to bash it (however lightly) against a door frame, they have a different view. Use of one sensor is hardly a thorough test, and I think your zeal in criticising what many find to be an excellent product, with basically no experience of it, may be what is driving the responses.