Tomatoes: Don't believe the hype

I have heard from various sources that you can successfully ripen green tomatoes by putting them in a drawer, box etc. with a banana. The gas released by the banana as it ripens will turn the tomatoes red. I am happy to confirm that this is complete rubbish. All you get are mouldy tomatoes, a wasted banana, and if you're really lucky some nasty liquid will dribble out of whatever container you're using. The best thing I have found for green tomatoes so far is to chuck 'em straight back on the compost heap.