As always, it depends.
One remote site actually has a badge holder in clear view through the glass door used to access the building. Seriously. They have been reported to HR many times. Still there.
At our data center we have signs that clearly state leaving the door propped open is a violation and to not do so. It is propped open about half the time.
Some staff refuse to wear their badges, others wear them all the time. Losing a badge costs about $4, and if you have a wafer to open doors that is an additional $4. When you consider the cost of the materials it may seem high, but if you consider the cost of the staff that makes the badge, we lose money. When you consider the wafers, and that another department handles them, well it seems fair to me.
My issue is the retractable reels don't extend far enough, so you have to lean over or otherwise contort yourself to be able to use the wafers. Clocks are one height, door scanners another. If you wear a lanyard, they are too short for most people, and the policy calls for them to hang at your breast. So if you wear one long enough to be useful, it is in violation. Then there is the issue that you can't ever look at a woman's badge to get their name due to where they are located.
So mine is on a detachable lanyard, and I remove it to use it.