The Extremist Threat from Metallica

No, this is serious - James Hetfield from Metallica questioned by airport security personel before the Live Earth concert in London because of "taliban-like beard" :

"According to British newspaper The Times, the rocker jetted into Luton airport ahead of Saturday's Live Earth concert at Wembley Stadium - where his legendary rock band was due to perform - but was halted by officials before he could leave the terminal. The legendary frontman was then subjected to a brief line of questioning, after which security-conscious officials were left red-faced when Hetfield explained he was a member of a world-famous rock band."

In 2007, if you're named Muhammad you'll be living the life of someone else's stereotype that you're a terrorist, and with a beard it's even more suspicious, which is perhaps why Muslims in the U.K started an anti-terror campaign "Not in Your Name" trying to distinguish themselves from such simple and totally wrong stereotypes.