I think asking them to say "I am Real" is a waste of time. You could get much more useful information by asking them to do something else that would also show that they read your instructions.

I prefer to ask them to demonstrate their knowledge or skills in some way. Either:

a) researching something very minor that will only take 5-10 minutes

b) including samples of something very specific they did that is relevant to the task you posted

And then if they don't include what you requested, you can delete them because they obviously didn't read it.