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.
If you're using someone elses e-mail adress for playing games online then I would say yes I would say that is illegal, but if you use your own e-mail adress to play games online that that wouldn't be a problem.
It is illegal to steal someone elses copy of Minecraft, buy it yourself!
hopping someone elses fence to go swimming in their pool. (illegal) don't do it
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.