Aren't all polls self-selecting, given that most people who get a random survey thrust at them out of the blue will ignore it? People still choose whether they participate.
No they aren't. A self selecting poll isn't one you choose to fill out if you are randomly selected, it's one you choose to fill out and has no control by the person putting the poll out as to who can and can't fill the form out.
It's a technical term that means something when it comes to the science of polling. Sort of like how Theory means something different when you are talking about common usage versus scientific usage.
This is just a discussion, the nay-sayers seem to be treating it with more importance than anyone else.
Sure, and it's fine for that.. I just thought it was interesting to consider what it can and can't show... and the flaws of the type of poll that it is.