Crap adverts

I really, really want to know who’s responsible for stupid online pop-ups and banner ads that look like this:

the creator of this image is an obvious knob.

Why? Leaving aside the dubious practice of producing adverts which look like system messages, or which claim to be security reports (stand up, you cretin, I’m talking about you), how can you make such an inept job of it? I mean, its not THAT hard to make it look vaguely convincing…