Psh, when is Larry not angry?
What's wrong with experiencing a fantasy? I'd love to have a little cuddle with Bono, onstage or off. That doesn't mean I'd be fantasizing about being his girlfriend, it just means I'd be enjoying his touch.
U2 (and perhaps especially Bono) treat their fans well because they know what it's like to be fans. If you're a fan of someone, you want to be near them, be noticed by them, talk to them. This represents itself in different ways. I'm a fan of certain elderly authors (the oldest of which is old enough to be my grandfather), and I'd certainly love to sit down and chat with him about his books. Is that celebrity worship?
When you're physically attracted to the celebrities in question (rather than just intellectually attracted), you want to be physically near them, to touch them and admire them. It's not necessarily sexual, and it's not necessarily a bad thing. I don't see anything wrong with Bono allowing it, because he knows he's not just making some girl's day, he's making her life. He's giving her a memory she'll be able to hold on to and look back on fondly for years and years.
And as for not wanting your girlfriend cuddling up to Bono? That's your business. Not all men would be bothered by it, and not all men are (I recall a photo of Bono holding a sign he'd plucked from the audience: 'Bono, please touch my wife!'), because these men understand they're allowing the woman they love to have a little extra thrill, and are not threatened by it. Cuddling up to Bono is not going to make a girl love her boyfriend/husband any less. And if the tables were turned and my boyfriend wanted to have a cuddle with Shakira or something... well fine. It's just a cuddle, it's not like he's running off and eloping.