These are usually spread by word of mouth, rather than Googling. Of course, Google and Microsoft own a browser and can block them client-side, but that will onl

These are usually spread by word of mouth, rather than Googling. Of course, Google and Microsoft own a browser and can block them client-side, but that will only cause people to switch to alternative browsers. Finally, an OS-level block or even hardware-level block could be attempted. I think we'll be heading into that direction at some point.