Not to put too fine a point on it, BUT the post was more along the lines of 'How many on the head of pin'.
With speculation, ANYTHING and EVERYTHING becomes 'possible'. If the universe 'curves back on itself' it is perfectly obvious that you would never be able to detect or prove such - everything observable would 'curve back in on itself' also. Ipso facto.
Too much star streak will do funny things to your mind.
Eg. The concept of infinite inertia - defies the very basic and fundamental LAW of Science regarding conservation (in the entire universe) of momentum - upon which ALL of quantum physics relies.