I anticipated twins with The school directory sync system I made for a small District (sub-5000 enrollment). I appended a random two digit number to first initial, last name (EAnderson96). So far none of the parents who have "weaponized"(1) the naming of their children have managed to break it since we brought it up in '99.
(1) Hypothetical John Smith and his siblings Jane Smith, James Smith, Janet Smith, Jack Smith, etc. It's a bit infuriating how many parents do this. Amusingly I've had O'Brien and other apostrophe-contsining names with no ill effects (because I sanitize my inputs). In the last couple years, though, I was forced to start dropping apostrophes because we had third-party apps/services we were syncing to that couldn't handle them.
I have an apostrophe too and it broke many websites. It was also a natural source of SQL injection detection.
About 20 years ago, I was able to see a bit more than what I supposed to from the Ikea website. Nowadays, I see mostly encoding issues, especially in notification pop-ups.
I joked with my wife about using numbers in our daughter's name (k-rad 31337 style, with the first "letter" being a 3). I thought it would probably shake-out crappy software. In the end I knew it would be a mean thing to saddle the child with. It sounded like fun, though.
(1) Hypothetical John Smith and his siblings Jane Smith, James Smith, Janet Smith, Jack Smith, etc. It's a bit infuriating how many parents do this. Amusingly I've had O'Brien and other apostrophe-contsining names with no ill effects (because I sanitize my inputs). In the last couple years, though, I was forced to start dropping apostrophes because we had third-party apps/services we were syncing to that couldn't handle them.