Brilliant! I wish I knew a local group because I'd be more than happy to take part in this type of action, though I'd be noisier about it. On that note, it's clear that noise pollution is unacceptable, while filling the air with hydrocarbons isn't - it's a funny old world eh?
The quote on that page from some corporate twat who says 'These stunts are becoming tiresome and do nothing more than peddle inaccurate propaganda' is great... because of course, we'd never hear a corporate twat spreading propaganda would we?!