Just like mvleming, I use a bilateral personal audio cable that jacks into my processors directly.
There are two major things wrong with the post:
1) "Nobody else can hear it" - Well, no, when I was listening to music with my hearing aids (Before I got my implants), well, even the best seal on 130db music can't prevent some of it leaking out of your ear and annoying your coworkers.
2) Induction loops are extremely prone to interference. There are many buildings in which Telecoil mode gets you really raw static noise. On airplanes, it's intolerably loud - you can't use induction loops on airplanes. At all.