""Sometimes I wish FB came with an IQ filter, to screen out the overload of stupid. ""
Having a low IQ isn't the same as being Stupid/a con merchant or a twat.
My DD has a low IQ as part of having a Learning Disability, she certainly knows how to behave decently and is a kind, honest, empathetic person, who doesn't think that the World owes them.
So you'd like everyone with a LD banned from FB? It's a way of escaping the isolation that LDs can bring.
Look at yourself before you want others banished from having access to what you take for granted.
The "low IQ" comments is one of the last forms of everyday anti-disability bigatry that is still bandied about, without thought.