I'd never do anything "risky" in a prod environment if I considered it so at the time, but in retrospect there's *lots* of things considered risky now (both from a security and good practice viewpoint) that were standard practice not long ago:

- Not using any form of version control
- No tests (including no unit tests)
- Not considering XSS vulnerabilities
- Completely ignoring CSRF vulnerabilities
- Storing passwords as unsalted MD5 hashes (heck that was considered very *secure* in the days of plaintext password storage.)

...etc. I'm guilty of all of those previously. I daresay in the future there will be yet more things that may be standard practice now, but become taboos we look back on with similar disdain.