Why do we post? I post, therefore I am, but why?
Are you having serious doubts about this internet thing? 'Cause I am just fine. Anyway, I post because I can actually get whatever is in my mind down on some sort of paper, be it virtual or material. I also love the company I have. ::kisses::
Why do I post? Me?
When someone asks a question I know the answer to, when someone says something I can relate to, when I think it might be good to add to the thread.
I rarely start a thread, but the ones I did have helped me understand things or have made me realize how NOT alone I am.
You haven’t proved that I exist, or that I’m posting. Maybe I’m just your cat singing to you (but how do you know that you have a cat? How do you know that you don’t have a cat?). In fact, you haven’t even proved that my posting (if that’s what this is) implies my existence.
Clayton, I am going to assume you intended this as a human behavior question rather than as an existential question… in which case:
Humans evolved as a pack species, like gorillas. We started out hunting and gathering in small groups. There was an alpha male* who had his run of the females. Then along came agriculture and it became even more important for humans to work in groups. Then the pyramids so that the UFOs could find us ;). Ad nauseum… gets to industrial revolution, the US, the automobile, air travel, the computer age. So now, here we are, often separated by time or distance from our families. Americans in particular are a peripatetic breed. But we still have a strong need to feel part of a group. We tend to seek out the groups with which we can feel comfortable. The SMDB tends to attract a certain type, or rather, several types that thrive on this interaction.
How’s that?
Or, *I thinks, therefore I yam! ugguhguhguhguh - Popeye Descartes *
[sub]*new thread idea: who is the ** SMDB Alpha **? [/sub]
I post hoping that someone will respond to what I say and thereby help validate my existence.
[tumbleweeds]
hello?
[/tumbleweeds]
Alphagene. Duh. Says so right in the name. 
I can validate your existence. Your parking, however, is beyond my power.
Why do I post? Because it’s there.
LOLIAEHATAM*
[sub]*Laughing out loud in an empty house at two a.m.[/sub]
thankyouthankyouthankyouthankyou. Now I can go to bed.
I just realized that UltraFilter’s post didn’t even quote me. It had my words but quoted ShibbOleth. Great. Alright, pass me the scotch and where are my sleeping pills?
It’s cool, you can have my existence, Ultrafilter has already stamped it. Anyway, I took the bus.
And thanks for reminding me about the Remy Grand Cru located conveniently near by. Now maybe I can get to sleep soon.
Multiple quotes are just as difficult as validating parking. 
Sorry, didn’t mean to be rude. Could I offer either of you a cognac?
Now you’re talking…