Legal to enter abbandoned buildings?

because of insurance reasons the owner can kick you off property. He can also if wanted get you for tresping. Legally if u were say to fall u could turn around and sue him. Most likely if ur not disturbing others having parties being loud nobody will notice ur there. But legally if cops come and theres no illegal activity they get u for tresping or they can be *** and get u for breaking and entering.