There are whole Facebook groups devoted to hating Bono, and those groups have thousands of members. The U2 singer is widely seen as a hypocrite, preaching about charitable causes and ending world hunger, but at the same time owning shares in Facebook and a luxury hotel chain. On top of that, despite being Irish, he goes to extreme lengths to ensure his tax affairs are dealt with offshore, so he pays as little as possible. The suspicion is that if Bono really cared about making poverty history, with his near-$1bn fortune he could just pay for it to happen.
Regardless of what you think of Bono's charity work, and whether or not he does it to elevate his own profile, what can't be denied is that he's been effective. The National Journal went as far as naming him the most politically effective celebrity of all time. Between charity singles and awareness campaigns, Bono has raised millions of dollars for many causes which support Africa's most vulnerable people. He was also knighted by the Queen of England for his humanitarian achievements.