There are some good ones for hobbyists Dedworth, like Flickr for photographers and I am a also member of a couple of small ones, one fairly private one for Scottish enthusiasts of a particular motor car, mostly good friends of mine![]()
You get flame wars and arguments and fall outs on all of them even on Flickr but largely it's fairly civilized.
I have a fake hidden Facebook account, not in my name but only because my Scottish daughter asked me to get one about 5 years back (I think it was around then).
I was just not prepared to put that much info out there on myself on a site like FB although in reality I have probably posted more intimate personal information here.
I agree with you about Facebook though, I don't use it unless I need some data from it.
Flickr on the other hand has, for me, been a great place to make new friends, like minds and all that and filipinouk has been a life saver, in some ways, for me over the last year!
Jim