The ones they way they are being, (mis)applied go against the constitutional principle of being innocent until proven guilty.
Then you have the whole idea that once you've been convicted of a felony, the much easier to convict 'domestic violence,' and/or have the least non-crime of having a restraining order awarded against you, or in the process of fighting any CHARGE of felony and/or domestic violence you can't own firearms.
If a person is so dangerous that the government and it's bootlickers says that they should not own firearms then why did they let them out of jail?
Once a person is out of jail the punishment should be over. They should be able to own guns again and if they commit a crime with them, I would hope that, an armed citizen will stop the need of the state from ever having to house and feed them ever again.
Domestic violence has such a low bar for proving of guilt that it's sickening that it's used to disarm someone ever.
Back in the 'old days' once you did your time you were given your guns back and told to not screw up like that again. At least one state would issue you a double barrel shotgun and (I think it was) a mule upon release. It was a way of recognizing your right to defend yourself and your right to travel and to symbolize that you were now a freeman once again.
The current background checks are an infringement on my right to keep and bear arms.