A bit off topic but in the french internet there is an add, these days, asking people to try the Turing test to find a (good) job. I find it very funny. Imagine a job interview where you have to be turing-complient to get the job : you play the tape and the recruiter act like a scanning device...
I wouldn't say that it's on accident. The theoretical definition of Regular Expressions is specifically not Turing complete. But Regex as a tool just isn't as useful in that form, so it was deliberately extended to be Turing complete with new operators.
