[amadeuspzs]

Not that the authors would claim any differently, but I am going to go out on a limb and state that RDBMS Horror Stories are more frequent, and with higher overall impact.

Purely from a SQLi point of view we have: https://codecurmudgeon.com/wp/sql-injection-hall-of-shame/

[commandlinefan]

Or programming in general horror stories: http://thedailywtf.com/