its a forum, full of opinions, if all opinions where the same we would not need a forum in the first place as everyone would know the answer to a problem.
How to sort the wheat from the chaf?
Well first off, dont ignore the chaf, if a post is deemed to be missleading we must say so imo.
The hard bit is doing so without upsetting the good intentions of the person who gets it wrong.
We all cock up from time to time, we get tired, miss read, speed read, get distracted by work as the boss looks over your shoulder while your replying, etc etc.
We should bare that in mind when taking advice as well.
I get concerned about my own advice when i see others ignored when talking, well, rubbish basickly. If nobody picks up on it, they wont pick up on my errors either perhaps. I hope i would be politely corrected.
For the record, i've had bad advice as well, carlton rear donut bushes being the most obvious one. But it was given with good intention and would have been worthwhile if the blasted things would stay in.