Yes, it is generally considered illegal to put a sticker on someone's car without their permission, as it can be considered vandalism or tampering with someone else's property.
No.
Yes
Yes, it is generally illegal to put a sticker on someone's car window without their permission, as it can be considered vandalism or defacement of property.
If you find a sticker on your car that you did not put there yourself, it is likely that someone has placed it on your car without your permission.
Yes. It doesn't matter if you make money off of it or not. If you use someone else's music without their permission it is ILLEGAL.
Yes, it is illegal to tow someone else's car without their permission.
You can't. And shouldn't.
It is generally not illegal to take screenshots without permission, but sharing or using those screenshots without permission may violate privacy or copyright laws.
Not if you have their permission, or the permission of their guardian if they are under age. If you are going to go into the business of cutting hair, it is probably illegal without a license.
Yes, it is illegal to send unsolicited emails without permission, as it violates anti-spam laws.
Downloading copyrighted material without permission is illegal and constitutes copyright infringement.
No, it is illegal for someone to enter your property without permission.