I wouldn't restrict access.
To my mind this forum offers something for everyone. I agree
For many it's a tool for education, for others, it's something to while away time and for some it's even a job center.
Same as above
I'd much rather someone came on here to ask for advice, and leave knowing enough to make an informed decision.
Again
To decide whether they are up to the job, or whether they should get someone in to do it.
You can't really tell from a few lines posted on an internet forum who is capable.
If in doubt, don't post advice or anything! It's really quite easy not to reply!
If we restrict access, people will just go to other forums, and perhaps get good advice, or perhaps get bad.
Who knows?
DIYnot!
I think that if access were to be restricted, the forum would decline, lose revenue and probably cease to exist in the near future.
Can't see any restrictions around these parts.