In some ways this is a virus...
The wasted time that is caused where intelligent people have to wade through the same message copy and pasted in a huge status-stupidity-stack makes this as bad as a virus. Also, having to explain yet again to someone why they shouldn't forward everything just because someone said their toes would fall if they didn't is extremely annoying and can derail your train of thought from whatever bit of work you were trying to ignore in the first place.
This sort of behaviour is viral and is the hacking equivalent of social engineering. It's more gullibility-engineering. So maybe we need a new phrase for a social virus spread by idiots with a damaging payload of stupidity.
Google must have enough info on everyone by now to know their IQ. Perhaps everyone could have an app similar to anti-virus software that would filter out all email and web content below a certain level of intelligence. If you ever read something stupid anywhere then you would know that either:
a) you need to update your IQ definitions
b) you wrote it