There are some questions like Effectiveness of technical analysis techniques: Any supporting studies? which may come down to "do you use technical analysis?" (Or it may actually be clarified to something else; it's just an example.)
If it's the former, I feel we should close them. There's no objective answer, just a bunch of people who happen to use it or not.
I'd be much happier with people asking
- given Y, should I use X?
- is there theoretical support for X?
- is X commonly used?
I guess this may be almost a meta faq.