Drinking with them nor allowing it at home is okay.
It's not okay to drink with your children.
It's not okay to allow children to drink in your home.
It's not okay to allow and give other people's children permission to drink and access to alcohol.
It's not okay to have alcohol in the house with children...especially in an non private space, where they can easily access, in quantities...in a place with a flimsy lock.
You are just giving them another place to drink and free booze. Permission to get as drunk as they want and to become alcoholics in your home. Which would backfire on you if they ever were. They'd blame you.
You can't stop them from drinking elsewhere..or all together.
You have to let them make their own choices, and accept any consequences with it...learn lessons, and grow. Develop into their own person. You need to just trust them, and trust that they will make responsible decisions on their own...eventually.
Life happens to everyone. You can't prevent nor protect them from life.
Not all teenagers drink, and not all teenagers are irresponsible.
You don't even know for sure that they vandalized and stole.
Assuming that they would just drink and be irresponsible is weird...as not all teenagers drink, and a lot who do are responsible and know their limits.
Your house is not the safe environment that you feel it is.
You and the environment are promoting and encouraging your children to have an alcohol dependency problem. ..
(Which if they're stealing alcohol, they perhaps already have)
You also are basically giving them permission to not respect your home, you, and the boundaries that are needed to be in place.
You are encouraging them to mask their problems in alcohol. ..poor mental health.
They keep stealing because you haven't acted as a parent in this situation, perhaps in others... Therefore they don't respect you, nor the home. Trying to be "cool" parents ..You give them mixed messages.. one hand you're acting like a buddy/ a lieniet parent...then you're trying to be authoritative.
Seriously, you have to work on getting control and reign of your house...and learn to be responsible parents.
Remove all the alcohol from your home. Keep the home alcohol free. If you feel like a drink, go out and have one..
Stop giving local children alcohol..before you wind up with large problems.
Perhaps you, your children, and their dad((?) Should attend rehab, and learn how to have a good time without alcohol.