content: They can't resist the temptation to make the ads impossible to ignore.  Click a link to read an article => full page obscured by nag screen Doing research in the school library between classes => loud sound effects and music playing with no mute or volume control Watching relaxation and meditation videos on youtube => half way through a commercial interrupts your inner peace screaming at maximum volume for you to buy whatever garbage they're selling  It is a great example of a "slippery slope". Years ago we gave advertising networks an inch of trust, now they're face fucking us at every turn.