Ideas on what to do knowing someone's locker combination

[Selkie]

Okay, so some incredibly stubborn, annoying, stupid pile of shit I know pissed me off extremely bad today. I am fuming with anger right now.

And, conveniently, I know his locker combination  magician;

So, give me some ideas on what to do to get him back, knowing his locker combination  caterpie;

[iWolf]

Change the combination.

[Daddy]

Put drugs in his locker and tell the police.

[Selkie]

Change the combination.

how?

[NOA_Haunted]

Does he know you know?

[Selkie]

Does he know you know?

yeah but I don't give a shit.

Also, he doesn't know mine though

[bluaki]

Change the combination.

Depends on the lock. All the lockers I've ever seen don't let you change the combination without a key, which the school keeps.

[Selkie]

Put drugs in his locker and tell the police.

I don't have any drugs available

[Selkie]

Depends on the lock. All the lockers I've ever seen don't let you change the combination without a key, which the school keeps.

Meh, also, he'd just have one of the janitors open it and put his other lock on.

so not that idea

[guff]

I don't have any drugs available

Make some.

[NOA_Haunted]

yeah but I don't give a shit.

Also, he doesn't know mine though

He will know who did it then idiot.

[Selkie]

He will know who did it then idiot.

Like I said, I don't care

if it affects him negatively, is him knowing who did it going to make it affect him less?

He doesn't have my combination so he can't do anything back, and he's a puny little whimp so I'm not afraid of him hurting me or anything.

[Kalahari Inkantation]

Shit in a bag and throw it in his locker.

[NOA_Haunted]

Like I said, I don't care

if it affects him negatively, is him knowing who did it going to make it affect him less?

He doesn't have my combination so he can't do anything back, and he's a puny little whimp so I'm not afraid of him hurting me or anything.

He can tell?

[Selkie]

He can tell?

Then everyone would just make fun of him for being a bitchy tattletale and make my endeavor even more successful.