I Don't Get Advertising

I get that makers of products have a need to make potential consumers aware of their products. I also get that there's this belief that any attention is good attention. I don't agree with it, but I get that some people believe it to be true. Personally, I don't know why you'd want to start a potential business arrangement (which is what a decision to purchase is) off where parties to the transaction are pissed off. I mean, me being pissed at someone or something doesn't typically encourage me to become involved with them. So, whenever it happens, I always wonder, "do websites (etc). really think that obnoxious, loud, multimedia adverts are a good way to encourage return visits (or ad clicks)?"