It is completely unfair for felons to be shut out of jobs because of non-violent past mistakes that are ancient history and would not re-occur. On the other hand, we have no idea who made this page. If they want to be taken seriously and given a chance, they need to be transparent enough to at least tell us who they are, and let us make our own decision on working with them.
And violent past mistakes up to a point. I know someone who punched someone when they were both drunk and the other was harassing his wife, and ended up with a criminal conviction. Never been violent before, and not been violent since (it must be close to a decade ago at this point). It would be absurd if he was completely shut out of jobs due to that one mistake.
Besides, any one of us could commit awful acts given the wrong environment. Stanley Milgram showed us all that much.