Authorities estimate about 4,000 loons are roaming around London right now. Some of them trying to cause trouble as President Obama and other world leaders are trying to right the economy.

These protesters hate the world economy and just about everything else. Many of them are angry misfits, who derive pleasure from destroying stuff. Luckily, nobody has been seriously hurt thus far, but property has been damaged, arrests been made and the London police are showing remarkable restraint in the face of provocation.

From what we've seen, there are basically three groups of loons: anti-capitalists who want universal communism; environmental extremists who have a litany of complaints; and anti-war folks who want to give peace a chance while bin Laden and his crew cut off people's heads.

Of course, these groups have been around for decades, but the Internet has given them a lot of power. They can now mobilize, organize, and provoke in worldwide cyberspace. That gives the loons a tactical advantage.

Now we're seeing this in America as well. Political pressure groups using the Net to damage their opponents by organizing and smearing and pressuring President Obama. President Obama should take a hard look outside his hotel window this evening at the crew in the street because they are becoming very dangerous.

Also, jihadists are now using the Net to organize violence and recruitment. The president should think about how to deal with the growing threat.

Today, Mr. Obama met with world leaders and the queen and other dignitaries -- mostly dog and pony show stuff. The two best sources of information we've seen on the summit are stratfor.com and globalpost.com. You can check both of those out on billoreilly.com.

You see, we use the Net to do good.

Talking Points remains uneasy, however, about the Obama administration's lack of urgency when it comes to terrorism and anarchy. Jettisoning the "War on Terror" phrase, closing Gitmo, considering the release of captured jihadists, all of that is dubious to say the least.

So maybe -- just maybe -- President Obama will see the future when he looks at the hoards rampaging around London. He better see something because sooner or later, he's going to have to deal with it.

And that's The Memo.

Pinheads & Patriots

As you may know, the Jonas Brothers are the hottest rock group in the country for the younger set. And they're going to be touring around this summer. Tickets are very hard to get. Many parents do not want to disappoint their kids, however, so drastic measures have taken place.

In Miami, a radio station offered parents a Jonas Brothers ticket for every eyebrow they waxed out. Ooh. Kind of dopey, but eyebrows do grow back. Now, you can look at this two ways. They're pinheads for going along with the radio stunt or patriots for trying to make their kids happy. You make the call.

No call necessary on this guy: Taliban leader Baitullah Mehsud, who is vowing to attack America, especially barber shops. This creep has a $5 million bounty on his head, and we hope somebody collects it very soon.

You can catch Bill O'Reilly's "Talking Points Memo" and "Pinheads & Patriots" weeknights at 8 and 11 p.m. ET on the FOX News Channel and any time on foxnews.com/oreilly. Send your comments to: oreilly@foxnews.com