I really do not understand the vitriol and snide remarks targeted at Mr. McAfee.
First off, he does have some experience in this area. In 1994, he founded Tribal Voice, which made one of the first—if not the first—instant messaging programs, PowWow. The first version of it ran under Windows 3.1. Many of the features that modern IM programs use were created at Tribal Voice, such as mapping an email address to an IM address, using DNS-style lookups to map IM address to IP address, P2P communications, shared-URL web browsing, etc.
While Tribal Voice was never the financial success that McAfee Associates was, it did make a product that was used by millions of people, and Mr. McAfee certainly learned from the experience.
I downloaded the Chadder app and played around with it on my smartphone and tablet. Sure, it's a little rough, but about what I'd expect from the gen one release of any new product, and I'm sure it will get better over time. Likewise, it probably is going to contain some security issues, simply because it is an immature product, and it will be important to watch and see how quickly and thoroughly the dev team responds to any issues which arise, just like with any other piece of code.
People who are celebrities—whether they sought it or not—often get made fun of in the mass media, but beginning a headline with "Noted crazyman John McAfee" seems downright mean-spirited to me.