I think people need to be educated that SQLI bugs (errors in escaping) lead to usability issues as well as security issues. I can't count the number of times I've searched for something on a clearly handmade site and watched in amusement as my search query grows backslashes while paging through the results. Also, single quotes show up in more places than people realize: I've seen them in proper names, street addresses, uploaded filenames... if those things break your app or damage data, that should be a tangible concern.