Yes, it is illegal to open someone else's mail that is delivered to your address. This is a violation of federal law under the Mail Theft Statute.
no it is not illegal but is good to check first
No,it is rude and illegal to rip someone elses' campaign poster.
That is fraud!
It can depend on what your motive was in doing so. If your motive was unlawful, yes, it would be a violation of US Postal Laws.
Is it illeagal to change someone elses password?
No. This is done all the time by creditors.
You don't, because that would be illegal.
hopping someone elses fence to go swimming in their pool. (illegal) don't do it
It is illegal to steal someone elses copy of Minecraft, buy it yourself!
if you have guessed someone's bebo account password is it illegal to enter that account
NO!!! I think that's illegal unless you have that person with you.
Yes, section 23 of the Postal Services Avt 1998.