You are safer without a knife

[HoreTore]

I am agreeing that if you can trust yourself to be responsible then having a weapon as a last resort would be no bad thing..

But the point of it wasn't about responsible people with perfect judgment, but the general public, wasn't it? And since very few people have been exposed to situations like these, it's likely that very few have the proper judgment, and hence them warning people against carrying knives, as it is false safety.

People in general are likely not to have the judgment required to know what to do, and as such carrying a knife is likely to do more damage than good.

Also, a few pints of scotch tend to seriously ruin your judgment on everything, and carrying a knife with you at such times is a genuinely bad idea.