[foepys]

They can advise as much as they want, people just do it anyways.

Same with smoking, drinking, taking drugs, etc.

[netsharc]

One hopes people with a device keeping them alive would have an incentive to follow instructions, especially if it doesn't involve addictive substances. They also get told to avoid metal detectors, and they know to do this, so it's probably, hopefully, an easy habit to change