Paul,
After joining GR quite recently, I was initially pro-active about searching out possible matches for my ancestors. Unfortunately, I came across a number of people who replied something like - "sorry (or not as the case may be

) I have so many people on my tree, so I'm not able to respond, if you find a definite connection with any of mine let me know". One individual did let me look at their tree which had thousands of seemingly dispirate people on it (looked like a data dump from the IGI or somesuch) and the one I was interested in had no meaninful connections or data.
On the other hand, I have had a little bit of luck too.
But I'm curious why one would do such a thing??
Yours wonderingly
Jonathan