Sorry for coming so late to the discussion but I found it too awkward how everyone who's answered you has only commented on the walking distance.
You said 'wherever you happen to live'. Well I live in Germany and I won't say we don't have bar fights over here but I can assure you that you can't just walk into any bar and start a fight. People in general are less and less tolerant towards violent behaviour and more often than not they will stop the bar fight before it really begins. The 'bad places', where people just don't care what's happening around them, have bouncers who will kick you out at the first sign of violent behaviour.
Commenting on the original topic, I like to think, the more people are exposed to virtual violence (or human suffering in general) - and it's not just video games today but also news espacially war / disaster coverage, documentaries and of course movies - the more people grow sensitive towards any of that happening 'for real'. We don't need to see what a broken beer bottle can do to a person's face to learn that it's a Bad Thing because we have already seen an artistic depiction or maybe even actual footage of it in a video game or on the Internet or TV.