I understand the overwhelming opposition to this, and I wouldn't do it myself. However, I lead a life of very few meetings (I'd actually appreciate more--this stance puts me in a very small company, to be sure), so it's easy for me to say that one should be more judicious with one's timing.
I can emphathise with someone stuck in meetings all day in a predominantly listening role, that they consider perfunctory or mostly pointless, or maybe in a very active role that has them stressfully bouncing from meeting to meeting.
I can easily envision how this would lead to a kind of nihilistic resignation and a determination to just do normal life stuff with a headset on one's head.
> However, I lead a life of very few meetings
An old business partner had meetings which felt like 24/7. He had zero issue taking a phone call in the bathroom. I doubt anyone on the other end ever knew.
As a matter of fact, I do NOT understand the overwhelming opposition to this. What's your deal if a guy is good at multitasking and people on the other end of the wire don't mind it? It isn't like he is desecrating a temple, or intruding into your home and using your toilet, or jerking off in the public... Wait, actually I'd say even the latter shouldn't be your business, unless he stains something. Why cannot people mind their own business?
There’s a difference between passively listening to a meeting and actively participating, while being in the bathroom.
I would never do either. But one is less weird than the other.