Paul, I am not sure where you are coming from - this is a forum, where people discuss things in an open way. I along with many others (as you rightly point out) do not put their contact details down - that is the beauty of a forum. Take Wisey for instance, he has helped me by posting a link to a local plumber, who I have been told, has a good reputation.
Most of the people on here are quite helpfull - Agile, Gasco etc, and I can appreciate the humour, as long as it doesn't start to go OTT.
So, if you want to try being more constructive - go ahead, because at the moment you are sounding like a lot of the "professionals" who have attempted to mend my boiler in the past.
Once again, many thanks to all those who have posted sensible, informative and easily understood replies to my posts.