First of all, don’t subscribe or ‘like’ their facebook pages.
Second, if you have a friend who follows these prosperity “teachers” and likes to re-share their false propaganda, do this:
In your news feed scroll over to the down arrow at the upper right corner of the post > click on the down arrow > select “Hide all from ___”
That should do the trick!
I’m pretty sure you can do the same thing on your smart phones and devices.