Ads that force you to watch a video for X seconds, but in those X seconds they don't even show a logo or something, are money wasted indeed, again, IMHO.
Another example, ads that follow me. Oh god how I hate these. I visit a website, usually for a product that I already own, and the freaking ad from that company follows me wherever I go. This is money wasted.
Another example, I use Waze almost everyday to figure out the best route for my comute. My 4" screen phone sits there right on top of the radio. Whenever I stop the car, an ad pops up. But they make this ad so tiny that if I need to know what brand or product it is for, I have to pick my phone and look closer. This is money wasted.
The online advertising system is pretty broken... can I fix it?