It will just make them hate you.
Scream, burst into tears.
Calm down they’re just people.
Stick your camera in their face (without asking).
That’s a dick move man.
Creepily follow them down the street.
That’s stalking and you’ve got to stop.
Break into their hotel room.
Great way to creep them out.
Invade their personal space/grab them.
Most people don’t respond well to random strangers touching them.
Confess your undying love.
You don’t even know this person (even if you think you do).
Send them weird fan art.
Write creepy fan letters.
Interrupt their meals/drinks/family outing.
They are just trying to have a nice time, don’t ruin it by being a dick.