Hi Seren, and a warm welcome to UKS
You are definitely acting in a properly skeptical manner, if you ask me - questioning what you read, trying to get further info. Nobody in a skeptic organisation should ever object to probing questioning, conducted in a rational and reasonable manner :)
I agree with many of your sentiments here - people have freedom of action in a free country, and if they really must do this kinda daft stuff then let 'em. However there are two real cruch points when I think it ceases to become alright, when it really grates on me to just 'let it go'.I don't see why it's a problem if some daftie wants to lie around with polished rocks on their head listening to whale song. If they get something out of it, who am I to complain? Same as people who go to church. Doesn't do anything for me, but each to their own.
1. There is a potential for harm in false claims made for so-called remedies - if people lie about with crystals on their heads when they really should go to see a proper doctor, there is a danger that their condition will deteriorate. It doesn't have to be as extreme as cancer to be dangerous (although there have been tragic instances when exactly that has happened).
2. There are lots of people making lots of money out of palpably false claims - if you picked up your crystal from the seashore then that's one thing, but if you were fleeced for thirty quid by a snake-oil salesman for it then you've been done. Consumers have a right to be protected from such con tricks, just as they should be protected from misleading advertising or sales of any other sorts of goods.
The same kind of arguments can be applied to some flavours of religion (I stress some - there's a big topic for debate there!). For example, somebody who thinks they've been "healed by faith", and has made a substantial 'donation to the church' to express their gratitude, may suffer a damaging relapse and end up worse off than they were to start with.
As far as herbal remedies are concerned, as you say they are a different thing to homeopathy - at least they've got something in them which hasn't been diluted by a factor of many millions! However, they are not prescribed by doctors and I believe there are dangers that they may contain things which are contra-indicated with conventional treatments, and issues of this sort. There are other here more knowledgable about this than me, I leave it to them to discuss it.