Lets bear something in context for a moment, if anyone did actually produce 3 front page newspapers ahead of time with no close contact with a printing plant/pre press and posted it on a forum (Time Machine enabled) . They would be hunted down like a dog.
So point is there's no way anyone in their right mind would do such even if they could. Thats just my opinion.
All you have done my old friend, is inadvertently provided all the fake wannabe time travellers with another great excuse as to why they cannot fulfil the 3 Newspaper Headlines test ..