I think the reality is that you never know who you are dealing with in DR and their are some real hardcore thugs out there who are not least bit worried about walking up to your front door and knocking on it and shooting you, if you **** them off. Serious thugs are often very well connected and do not fear the system, they live in and out of it their entire lives, and when you can murder someone and be out of jail in 6 months you better be worried if you got one of these after you.
You gotta avoid attention at all costs, there are no macho points between gingos. But if that guy does cross the line, enough for you to draw your weapon then you best be sure you kill him and don't make a fuss about it. If it is deserved then often there is no reprisals. So just make sure that it is deserved.
If you see a guy in your garden and shoot to scare him off and hit and kill him then expect reprisals, he didn't deserve it in the eyes of family and friends. Warning shots are dangerous, shooting to wound is very stupid as you could kill. And if shooting to wound then it is obvious you don't think they deserve death yourself, and so expect his close peeps feel the same.
Be tolerant, but if you shoot, make sure it's to kill. And if he doesn't deserve death then don't shoot. I suppose there are situations where you could make it known you are armed, and that might leave a deterrent in general to neighbours etc. but that's about it.