Don't believe everything you see. I have seen Mick throwing things many things and he is often aiming at the crowd and then it is landing in the hand of a crew member who is in front of Mick and between him and the crowd. Remember these days Mick's assistants are never more than 3-5 feet away from him. He's got one for the guitar and one for more technical stuff and one for personal security and then another 2-3 everywhere he moves at the show, less that a guitar's throw away. But you don't see them. Because they are not part of the show, so they are always low key.
One time in Argentina I saw him throw out a T-shirt into the crowd. Not his own but a shirt that came from the crowd. The crowd throw them on stage in hundreds in Buenos Aires River Plate Stadium every show. What happened then was 10-20 T-shirts more came flying immediately so he did not do that anymore. As half the crowd swing their t-shirts throughout the show you can't just do like that Mick learned.
They have got duplicate guitars of course like the one he got replaced in Chicago this week see picture below but they don't just toss them aoround like The Who did in the 60's...
Mick with guitar problems on Rain Fall Down.
Helping hand from his guitar technician David Rouze.
Photo by Jim Pietryga.
Bjornulf