If you are talking about mailing someone then yes it is illegal not to mention highly dangerous.
yes
Sending a prank text message can be considered illegal if it falls under harassment, threats, or violates privacy laws. It's important to consider the recipient's feelings and well-being before sending any message that could be perceived as hurtful or offensive.
Yes. but not if the person receiving it asked you to send it
It is a crime to send any illegal substance through the mail.
It's actually illegal to send cash through U.S. mail. But alternative options are a money order, a visa (in the form of a gift card) or a personal check!
It is not illegal to buy or to consume snus in the UK but it is illegal to sell it
Yes, it is illegal to send urine through the mail as it can be considered a biohazard and pose health risks to postal workers and those who handle the package. Additionally, it may violate postal regulations on sending hazardous materials.
It is not illegal to send hair in the mail, but it is important to make sure it is properly packaged and doesn't violate any postal regulations. It is recommended to check with your local postal service for specific guidelines on mailing items like hair.
No, but it is illegal to receive money for the files.
No, it is not illegal, but it is extremely annoying.
No
Not unless you intend to blackmail, threaten, stalk, or intimidate them... Famous people live under the same laws as the rest of us, they just have better lawyers. You are able to send them anything you might send a neighbour.