I don't think I'd enjoy watching the show as much as I do if some ringers weren't included each series.. I'd hate to watch a full series of absolute no dance training celebs. It would also likely mean the pros wouldn't be able to choreograph the trickier dances and show what they can do either.
I know Layton is a complete ringer but I do find it a bit off that so many people seem to think he shouldn't be there, yet Nigel who also has experience is a worthy contestant?
After the celeb payments were announced in a previous post it's no wonder people do the show, and Layton was obviously asked and accepted so he has every right to be in the competition in my eyes.
I don't know where you'd draw the line otherwise, ballet dancer years ago OK but west end musicals are a no go? It would be a nightmare to try decide who could and couldn't as many celebs will have some kind of dance background.