Naughty Strings: A list of strings likely to cause issues as user-input data
This reminded me of that story of people who have such strings for names:
<a href="http://www.bbc.com/future/story/20160325-the-names-that-break-computer-systems" rel="nofollow">http://www.bbc.com/future/story/20160325-the-names-that-brea...</a>