Should Trailers Be Forced To Pull a Real Load?

The Guardian is reporting that movie-goers are walking out of Sweeney Todd, apparently mortified to find themselves watching a musical.

Seems that the trailers in England (similiar to Canada) fail to include any indication that all of Johnny Depp and Helena Bonham Carter's lines are sung. Disgruntled ticket buyers have even gone so far as to complain to the Advertising Standards Authority.

I actually love that trailers rarely reflect the true crappiness of a film (the article notes that the recently released National Treasure 2 includes scenes that don't even appear in the film).

Trailers are like eye contact with a hot guy. Brief, exciting and almost free of mood-destroying dialogue, they hold all the promise of a shared life of love and sweat-soaked sex. Which is totally unlike actually going to see a movie, which these days is often like that awkward moment on your first date when you realize that pretty boy who you imagined would be funny and sensitive is actually really really dumb.