Trespassing is defined to be an entry into another person property without permission. By virtue of its definition, trespassing is illegal in some countries because one does not have the authority to enter the premises.
its not illegal if your not trespassing
It is TRESPASSING.
Yes, if you're there you're TRESPASSING.
It is if your trespassing on private properties. Otherwise no
If the person who is hosting the party doesn't want you there, that is trespassing, and yes, that is illegal.
It could be deemed as trespassing, which is illegal.
Depends on the states trespassing law
Trespassing, illegal drugs and underage drinking
Probably. If you have no legal right to be there then it would be trespassing or burglary.
Generally it is not illegal. You do have to verify local fishing regulations, by-laws and be mindful of potentially trespassing.
Billboards are private property, so yes, that would be trespassing.
In most states no. Trespassing and unlawful entry statutes make this illegal.