Andy:
Hope you will decide to stay on and "lurk" from time to time. You can of course keep up to date that way. If you feel compelled to write answers to posts and this is why you are leaving, then perhaps, you DO contribute greatly yourself to this community.
BTW: I think that everyone is entitled to their own opinion and that as a public forum, we should let the opinion be heard. This does not mean that we have to agree with everything posted, just remember that everyone here has feelings and opinions and we should do our best -- even if we think the poster is full of gump, to hear them out. If they get their facts wrong, correction is okay -- as long as it can be done without demeaning the individual who posted the original question or comment.
Anyhow, if you still are going to leave, I wish you a safe and trouble-free journey.
Take care,
Mike