Yes, it's considered vandalism.
It's illegal.
Yes
Yes it is
Only if you get caught(;
If it is not illegal, it is definitely immoral.
It's illegal for a person of any age to toilet paper a house. It is trespassing. Not to mention rude. Would you like it if you had to spend hours unraveling toilet paper from your trees because some kid played a prank on you?
, To answer you question, Indeed it is Illegal, it is not that serious that you would cop a fine or anything, but it certainly not Legal since you are vandalizing property you don't own.
Nature calls at all different times of the day so if you at someone's house you do not know that well just say, 'May I use your washroom please.' No host or hostess would say no.
Virtually every house has at least one toilet.
Answer
The owner of the land owns the house.
In Texas, there is no specific law that prohibits using toilet paper to decorate a house. However, using toilet paper to intentionally vandalize or damage someone's property could be considered criminal mischief under Texas law. It's always best to obtain permission before using any materials to decorate someone else's property.