Mattl, I'd say possibly to the first and definately not to the last.
The latter would have come across as 'mess with me and you're a dead man' .
Only had one incident that could have got me into serious trouble. Running around a local gathering spot, some drunk buffoon;showing off to his mates, thought it amusing to just step into my path and make me bounce off his bulk.
I didn't react to this but I did go up into the nearby woods and select a baseball bat piece of wood. For at least 10 minutes I jogged about in the hidden vicinity working out the best way to smash the guy and escape.
Well there's a saying, "Never make a decision when you are angry", its worth remembering. So, after I'd calmed down, I went on my way.
As for groups of kids, I once ran down a narrow path and happened across about 15 of them all around 16 years of age, drinking beer and stuff.
Since they were all bigger than me it could have been awkward. Instead I just stopped and cadged a drink off one of them and had a bit of a laugh.
Didn't stop me advising them that the best way to get your moneys worth out of booze is to drink just enough to get the effects, then hold back for a while. They knew I was on their side so ok with that.