Of course people shouldn't be throwing things but at €70+ per ticket, having to wait around for 3 hour I can understand some out of a crowd of thousands will eventually lose it. Playing beyond midnight during a weekday is not acceptable imo, at least not when they start so late. A different story when the concert just lasts too long.
Before I read and saw all this I didn't know Axl Rose had a reputation for "always" being late. How and why should I know about that, if I just wanted to go to see the show?
I would have been one of the people waiting around for hours wondering what the hell is going on. It's mighty embarrassing if you had invited others to come along too. Everyone involved, the backstage staff, promoters, security and people who work at the venue are all ready to put on a show. Then Axl Rose takes the piss. It's not right in my opinion.