Long story short, no.
The reason for saying no to this is that, when you attempt to hack the vault you have tremendous pressure on you. It was designed that way, often times MW and players are waiting to get in, so when someone fails a vault hack.. they are giving the police more of a chance to catch criminals. Now put yourself into the view of the MW.. the person who failed, now is giving police more of a chance to catch them. I would kill them too, anyone would.
If you aren't comfortable hacking with the pressure of knowing that if you fail, you die.. then let others hack.