If it is without their permission; yes it is illegal.
No,it is rude and illegal to rip someone elses' campaign poster.
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.
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 it is not illegal but is good to check first
NO!!! I think that's illegal unless you have that person with you.
Yes, section 23 of the Postal Services Avt 1998.
No, actually. It's not only illegal, it's also very inconsiderate.
Fraud, it is illegal, and you will be pushed off Facebook if caught doing it.