I don't use social stuff much, and never use wishlists, so there is no point of me registering there. I do appreciate the work the guys have done, though.

I'm on it though mostly for the integration script (I find peoples lists on there useful for seeing their games tastes when looking at recommendations) haven't edited my page apart from the integrated stuff but have been looking at pages on games I own to see if they could use updates etc

ME TOO!!!

To both questions, the answer is that I'm simply not interested. I see no reason to share my wishlist or my shelf - in fact, if GOG itself provided the option to display them, I would turn it off. As for the wiki, I have no knowledge worth contributing, but even if I did, I doubt that I would want to spend the time writing it up. There are thousands of people with far more in-depth knowledge than mine who would actually enjoy it.

To both questions, my answers are 90% the same as Mentalepsy

I do not wish to share my wishlist or my shelf - in fact, if GOG itself provided the option to display them, I would turn it off.

As for the wiki, I have no knowledge worth contributing [...]. There are thousands of people with far more in-depth knowledge than mine who would actually enjoy it.

How do I add a picture on GoGWiki?

[url=http://www.gogwiki.com/index.php?title=Special:GOGUser/SpirlaStairs/shelf]http://www.gogwiki.com/index.php?title=Special:GOGUser/SpirlaStairs/shelf[/url]

here's my shelf.

Well, because i didn't come to GOG for the socialization, sharing my shelf and such. ;)

Amen
And an even more concise response is:
Because I don't want to
I acutally wrote a long long diatribe on why I haven't and don't want to now, but, I figured I didn't want somone here trying to turn on me because they don't understand how my life is, and they can't fathom anyone who is different from them...Funny I know, but, I wasn't in the mood to open a can of worms, and try to explain in detail my life history, which they still couldn't comprehend more than likely...The best I can take from my deleted diatribe was that people are all different, plus many of us older guys didn't grow up with the internet and are not nearly as comfortable in telling the world about ourselves as some of our younger counterparts...Anyways to each there own my friend...Live and let GOGWiki or not. Hope I helped quench some of your curiousity, that's it for me though. ;D