There is a time and a place for everything.

But that doesn't mean that everyone gets their pet peeves accommodated in any fashion they choose.

Cell phone calls in restaurants merit either sending it to voice mail, or stepping into the lobby. Not the least of which choice is whether you feel you should give your dining experience and companion(s) your full attention.

One thing I resent about phones in general, and cell-phones in particular, is that the phone takes precedence over the conversation being engaged in or the service being rendered. Somehow, the caller is allowed to 'cut in line' or automatically becomes the winner for attention.

On the other hand, Becca, a doctor's waiting room is just that--- a place where customers wait for services to be rendered. Quite often, it seems, that the service business of which it is a part is sufficiently badly-organized and self-centered such that 'patient' is a term which applies in more ways than one.

Many doctors and their office staff feel free to waste 30, 45 minutes and more of a customer's valuable time because they're not sufficiently organized to keep to a schedule.

That time is not the doctor's time, and it's not your time, it's my time. So sign notwithstanding, I feel perfectly free to conduct a conversation on my mobile phone at a volume which is no louder than one I'd have with a person in the chair next to me. The fact that you can eavesdrop only one side of the conversation, and it annoys you is your problem. "Tough," as you say, "shit." This is particular the case when the time of the appointment (for which I'm polite enough to arrive on time) comes and goes.

Library reading-rooms are no place for cell-phone conversations, however use of a scrambler/jammer is over the top, and probably illegal. The FCC does not look kindly on what is termed 'malicious interference' with a duly-licensed mobile radio service; your little jammer requires a license, which you can't legally obtain.

In addition, suppose I'm in your fine institution with my mobile phone in my lapel pocket and set to 'vibrate' when a call or text message comes in.

Suppose I'm a physician on emergency call.
Suppose YOUR jammer prevents me from receiving a page.

Or maybe I'm a volunteer firefighter or paramedic, also on call.

You'd be legally and morally liable, particularly if your device was deemed to be in violation of FCC regulations.

Or, suppose some nut-job comes into the library and threatens harm to the patrons down at the far end. They have cell phones, but can't use them to summon help, because YOU installed a jamming device.

Seems to me that this 'cell phone users are self-absorbed' thing
cuts two ways...