I fail to see any problem with having frequency boundaries on the chart. I find it very helpful to help me ensure that I'm on the appropriate frequency.
If other pilots have a problem with the boundaries being displayed, they can ignore them and their problem is solved.
Making emergency calls on 121.5 is just not going to work at low level and you know it Dick. In over 40 years of RPT jet operations, mainly long haul international, I have only ever heard two emergency calls on 121.5 and they were oceanic where there was no VHF ground station anyway. I have heard quite a few on the control frequencies though.