Good point. Every single character of an address should be checked before use, especially for any non-trivial transaction amount. At just 35 or so characters, that's not too much to ask.

I worked on an idea about 10 years ago to generate a kind of "visual hash" that would basically change drastically with a small change in input. The idea was to basically hash an object of interest (in this case, you would hash the base58 address itself) and then use the bits of the hash as a kind of program to generate a fractal pattern similar to an L-system. This would give rise to a very visually unique flower/snowflake pattern. Something like this but more colorful. Maybe I'll buckle down, learn Python and give it another go.

Prior work.