I am not sure if this opinion is permitted here, but I would suggest that people just implement their own E2E and ignore any rules that suggest you must not do

I am not sure if this opinion is permitted here, but I would suggest that people just implement their own E2E and ignore any rules that suggest you must not do so. Obviously a business can not survive by this logic. Rather, implement systems that permit end users send whatever text they wish, potentially including obfuscated text. An example of business that have done this for decades would be all the amateur radio manufacturers. It is illegal to make a HAM radio that operates outside of the HAM bands. But... clip one diode, or hold down two buttons and power on the radio, presto, all frequencies unlocked, radio in "debug mode". Certainly similar logic could be implemented by clever people here. "One has not only a legal but a moral responsibility to obey just laws. Conversely, one has a moral responsibility to disobey unjust laws." --Martin Luther King, Jr.