Having your name on the weapon does not necessarily mean you went into an autowant to retrieve it. It depends on the map. Not like it matters, as a CT who is alive will never be able to see who a weapon was first picked up by without requesting it to be dropped first.
If you are shooting the weapon, or are running around with it unholstered pointing it at cts, you're going to get killed. If you have a weapon holstered, a CT should never kill you for that alone without first asking you to drop the weapon, shooting you if you refuse to comply in a timely manner.