I'm planning to get drunk at a concert and "embarrass" my s/o and their younger sibling
How do you think your s/o and their sibling would feel about you acting foolish?
They will be mortified hopefully.
It's wrong to try to embarrass people like that. Think about how low you will feel when you wake up the next day sober.
The next day this is going to make a great story that I can tell all my friends.
Your s/o and their sibling will be mortified as you said if you get drunk and act like an idiot in front of everyone, so doing this is not a good idea. Go to the concert and just enjoy the music instead.