I wish that they didn't have the table that you file past. They all just stood around and talked at the last concert I was at, and I really preferred that format, but at least I didn't feel as rushed in this autograph line as I have been at other concerts.
I'm not a fan of the table either, and from I can tell, nor are they. I went to a show one time where they set a table up for all of them and laid Sharpies out on it for each of them. I was working World Vision that night. Sara Harper was the rep, and I was standing with her at the WV booth. She looked over at the table and made some kind of comment about expecting they weren't going to like that. Then, sure enough, when they came out, they didn't even get close to the table. They just milled about with everyone in the lobby. *giggle* I felt bad for the people who put all that effort in to set up the tables.
I believe the concert rider now specifically states for the promoter to have a table available for the post-show autographs. They may not like it, but it's probably the best way to control the line/crowd after the show and establish some physical boundaries.