I only use them when I know it is correct, which is most tho not all of the time.
Here is the chapter and verse on when to use the apostrophe; this guide also covers the 'apostrophe after the end of the word' scenario.
I would say unless people are confident they are using them correctly, leave them off as it is quite distracting to read posts where they are incorrectly used, and no-one is likely to take correction without getting offended.
However the world is unlikely to end.
A ban would be an insult to those who do know how and when to use them, a sort of compulsory dumbing down.