Is pink slime really dangerous for you?

Not really. Pink slime isn't dangerous for you the way dog food probably isn't dangerous for you. It's kind of gross, not particularly nutritious for you, and full of by-product you'd feel better off not eating. But dangerous? No. Neither is a twinkie or a marshmallow peep.
No. Apparently it is safe because we all have been eating it for years without knowing. It is just kind of gross, but not dangerous.