Tell me about it. As a software developer I often just reference stuff by searching on Google. The most inane things get into profile that way and pop up as ads. Not to mention that money hungry sites rely on selling a link on their site and if there are a lot of ads it takess forever for the site to load even with fast broadband because the servers the ads are on are either overwhelmed or just plain slow. Most of the time you can see that the articles or what you wanted on the site have already loaded while the ads load.
Once again capitalism run amok.