People's Names That Break Websites

The intersection of rushed (or careless) development and unintended consequences:

We’re doing a story about people that have names that websites and computers don’t seem to like - for example, we spoke to a guy named William Test, and a woman named Katie Test, both of whom can’t seem to keep a hotel or airplane booking because the name “test” is flagged by internal systems.

We also spoke to a guy named Christopher Null who had the same problem, and woman named Joan Fread, who can’t use paypal because her last name is the same as a PHP command.

I’m curious if there’s anyone in the dev community that is thinking about this, and how to deal with it. Is it even considered a problem? Is the population that this affects so small that people don’t even think about it?