[In response to:
In 1992 you can have two wizards fight in the middle of the street, and reports of that dismissed as obviously bogus. In 2012, someone is going to streaming it live to Qik as five other people make phone calls and three other people tweet it. At that point, ignoring it requires pretending it's a very complicated hoax. ]
Magic and electronics don't mix. When wizards fight in the middle of the street everyone attempting to record it will be disappointed, the exception being if they're at a great distance with an impressive zoom. If they can be outside of the EM disruption field caused by the greater than normal release of magical energy but still have a line of sight, have a decent zoom and have a steady hand, then they can get it on tape. But when that happens you're unlikely to get more than a single recording, which means that it can still be dismissed as a hoax, especially if the way things look when wizards fight isn't too far from how we'd expect a hoaxer with access to computer effects software to fake them to look.
And that will be my explanation until I think of something better.