Hawaii's trespassing law, Haw. Rev. Stat. § 708-814, defines trespassing as "...if the person enters or remains unlawfully in or upon premises after a reasonable warning or request to leave by the owner or lessee." If you need to keep unwanted guests out, we've got signs for that. The signs are made from durable aluminum and printed with 3M ink to carry messages that will last for over ten years.