There are lots of folks that squeeze from whereever, and then make it look nice afterward--see, that's just inefficient, to me. If you squeeze from the bottom, you only have to do it once. If you squeeze from the middle and straighten it afterwards with the cap on, you have to bother with it twice. I don't have the patience for that.
Sky, that pic made my blood boil, too. I think what I hate about it is that I just don't get why you'd do it. They won't be able to squeeze anything out of that tube until it's straightened back out again. I think this is maybe the only thing I'm truly OCD about.