They are deceived so we should help them get out. But in the end it is up to them whether they will accept or refuse our help.
Here is "the brilliant" ball earther TooQik (spotted at 6.25 mark on the left) https://youtu.be/43mzW5j9KcU?t=6m25s  
Bonus: Top five epic fails of the ball earth team(Bob Ballblaw, Guido the globo, TooQik, etc...) https://www.youtube.com/watch?v=yXkCWMhkOk4