This is somewhat of a gullible question.... Don't it depend on how much you're under the influence?.. Under the influence of what? Weed, pills, meds, alcohol? If someone breaks in my house to harm my family, I don't care if I'm punch drunk, I'm going to use a weapon the best I can....
Where I'm from there are several people that hunts while drinking beer... They're not drunk, but you would have to say they were under the influence... People hunt after taking medication, smoking weed, etc.... On a cold frosty morning, I know several people who take a drink of liquor before going rabbit hunting... If you're in a city, then you shouldn't handle a gun, drunk, or sober...
Now, should a person sit around drunk playing with a loaded gun? That would be stupid of him, and anyone with any common since wouldn't do something like that... This sounds like a liberal question to get the politically correct answer....
I have never seen anyone do something crazy like this, so I don't understand the intent of the question... Did someone kill someone while drinking?... Unfortunately, that does happen, but not to people that are sane.....
I guess the answer of the question is, NO! STUPID PEOPLE SHOULD NOT SHOOT PEOPLE.. Neither drunk, or sober....