I already see it when trying to hire programmers and designers.

Because a programmer knows a mish-mash of PHP, Java and a little Javascript, they think that they are immediately qualified to write a scaleable web app.

Designers are even worse. Just because they know photoshop or dreamweaver, they think they are a designer.

I find that my programming candidates from the open-source world, though, tend to be better then those using the latest and greatest editor with some kind of intellisense on Windows.