The purpose of Digital Private Line (DPL Tone) is so many "user groups" can share the same channel without causing harmful interference to each other. The technology is extremely proficient at its intended purpose. The radio still receives a signal from a radio that doesn't have a matching sub-tone. The radio just discriminates between received signals and only opens the squelch when your selected code is detected. You can literally have 280 groups on one channel, all having different conversations, and not interfering with each other. Go to a major public event (like a Boy Scout Jamboree) and suddenly, 22 channels is no where near enough. Enter DPL on a modern FRS/GMRS combo radio and now you have the ability to have the equivalent of 6,160 channels. Even at a major event, the likelihood of interference due to things like splash, inter-modulation, etc, is almost zero. Especially when you are only using 0.5 watts of power. I see your point, I just disagree. "Familiar" and "intuitive" are words used to describe ease of ability to naturally understand how something works. That understanding ONLY comes with experience and repetition. No one is born familiar with anything and no one is born "intuitively" knowing how to do anything but suck and poop. Everything else is a learn skill. I already answered that question above (my first 2 paragraphs in this post) How you handle any harmful interference you may cause is up to you. If you don't want to use DPL.... don't use DPL. By no means is the feature "ruining" the radio service. It is extremely beneficial to the radio community and has been for 70 years.