Last night I was walking past the Grand Theatre in Wolverhampton when I noticed a guy swearing his head off down the street, and running towards me a chav clutching a bag. Clearly he'd just snatched it off the guy and was doing a runner. I thought about attempting to stop the guy but didn't, just let him run past. Was this the right thing to do, or cowardly inaction?
And more broadly speaking, should we intervene if we see trouble?