This is not a /me/ problem. I can solve the problem for myself by using a sharpie to write it on my phone.
Considering there is this rediculously big industry of selling cosmetic skins for smartphones (whole shops to just change phone cosmetics), not many people would likely mark up their phone with sharpies.
(edit) I appreciate the reference to the FaQ but it’s broken for me (Tor users). I can reach the faq via archive.org, but it’s dysfunctional (unfolding is broken).