Don't fight with the police and walk away if you can, but carrying on with your day instead of going home.
I've never been in trouble with the police, but I've ignored the odd silly instruction from them (particularly around football grounds).
That's ridiculous. So if a few mates are being a bit twattish in the park, and a policeman tells you to go home (like in this video), you're actually going to go home, regardless of how far it is, rather than carry on with your day peacefully, as planned.
I've not watched it with sound yet, will check it out later, but...
Well that's not right. They're supposed to uphold the law, not dictate it, so it depends what they're telling you to do.