Re: Hawaii 5-0 Season 3 discussion/spoilers
There actually seems to be a coordinated effort. A few months ago there was a span of about four weeks where tons of shows simultaneously seemed to feature in-show car ads where they didn't even bother to at least make a token attempt of concealing it.
At the moment it's not cars but annoying Microsoft ads (Bing, SkyDrive, Surface, Windows 8/Phone, ...).
Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.