A couple of years ago in S.C. my brother drove to a local bar, about a half a mile away and proceeded to get very drunk. When he left the bar he gave his keys to the bartender and walked home. About halfway home the police stopped him and charged him with public intoxication, even though he was just quietly and carefully walking, staying well away from traffic, which even the police officers admitted.
Seems you can't win either way.
I used to walk just under a mile to play pool and drink a few beers and then walk home; one night, the cops slowed down and asked if I needed help and I told them I was just walking home over the next rise, they said take it easy and went on their way.
I don't go there any more, too many drunks.