I have an idea, you could plant a Christmas tree in a pot now, and have in a year a real tree for your festivities, then you go to the forest and plant it.
Or you could go to the forest and take a small one, put it in a pot, take it home,
and after the festivities are done you return it.
Nah, kills the point of stealing one.
Though growing a fir tree in Finland for Christmas takes several years, as they grow so slowly. If I remember correctly, it is 5 or so.
I see your hand and up you one,
perhaps to reduce harm the Finnish gov should set out patches with trees,
where people can steal them from all the citizens instead of just from a particular one, much more exciting, then send you a mock fine, and even have mock police actors there to give you the adrenaline rush of (almost) getting caught.