The ONLY issue I have with this is if it would be used against you should something happen. In other words, you've already primed and prepared for shooting someone. Some aggressive DA could bring this up to a Grand Jury that you were looking for a fight and wanted to shoot someone.
Other than that, it's probably a good idea.
I know a self defense trainer that is always preaching to watch what you say and do, especially on the internet. He's an ex cop himself and has several LEOs working for him (including one police chief) teaching armed self defense. His advice is always good and based on fact. If I get a chance, I'm going to ask him about this.
One thing he would say about this thread... Don't get yourself in this situation to begin with. He'd say to walk away, especially if you are carrying.
Can't carry anything in the People's Republic of Maryland.