Theatre bloggers are in uproar about suggested plotlines for Neil LaBute and Theresa Rebeck's live playwriting promotion " and they're none too happy about West End ticket prices, eitherWho decides what a play is about? A playwright, you'd imagine " but not on the west coast of America, thanks to an LA Times promotion. "Neil LaBute and Theresa Rebeck want to write a play for you. LIVE!", says the strapline. The gener…