@alex@tyler well for one many text editors and fonts do not have real emoji support. Copying and pasting them results in a bunch of tofu. I don't know if this has a real chance to corrupt the file but it would look like random garbage to the user and would probably generate thousands of support tickets.
Second it's a visual mess and extremely distracting to the eyes. I can largely ignore 1085ad874728-47$!%;2)0. I can't ignore :niggathinkingass: :niggathinkingass: :niggathinkingass: :niggathinkingass: :niggathinkingass: :niggathinkingass: :niggathinkingass: :niggathinkingass: :niggathinkingass: :niggathinkingass: :niggathinkingass: :niggathinkingass: :niggathinkingass: :niggathinkingass: :niggathinkingass: :niggathinkingass: :niggathinkingass: :niggathinkingass: