Ok, lets look at this from another perspective. The passenger. If I knew that I was sitting in an uncomfortable, hot, metal tube for 1.5 hrs b/c the pilots wouldn't use 2 measly cell minutes because "it's the principle of the matter," not only would I be writing a letter to management about it, I would have volunteered my phone to get us on our way!
Ok, company approved avenues didn't work, you can sit and play disgruntled airline pilot, OR you can get your phone, make a phone call and quickly explain the situation, then hang up (1 or 2 minute phone call) then wait for your ACARS message.
I agree, you have to draw the line somewhere, but if you have to use your cell phone for company business twice a month, then so be it. If it's being abused by the company, then it's a problem, but you could have had 50 happy pax, instead you have 50 unhappy pax.
Just get the job done.
Oh yeah, I sometimes have to use my cell phone in Canada on business. The company didn't use to reimburse us, though they do now. But it's a flat rate and it doesn't cover my entire plan. So I guess, calls that have to be made in Canada, still come out of my pocket, oh well, it's got to be done to get the job done and to keep the customers happy.