I am happy to take the advice of experts all day long and I capitalise on their abilities and knowledge by making a mental or written note of the information I receive, which I value highly.
Unfortunately, there are a LOT of so called experts who haven't got a clue but don't let that stop them giving people duff info.
One type of "expert" has a little knowledge that they've gleaned and so they procede to show you how clever they are by answering a question which you haven't actually asked, ,just so you know how clever they are.
The next type of expert is mister "Can't be done". Oh how I laugh when they are proved wrong.
The worst of the lot though is the "expert" who doesn't know the answer but insists that he does, with breathtakingly arrogant confidence, for example telling you that an amplifier doesn't exist when you have the darned thing on your desk. These are the "man down the pub" types who always seem to be law experts as well, and send people to Court with ideas which end up costing them dear. Worst of all, this type of "expert", once proven wrong, resorts to insults and and threatening bully-boy tactics, rather than learning anything from the process.
Isn't the internet a wonderful place?