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Since there have only been a few cases to date, mostly in lower judicial instances, there is no guiding case law on this issue. Experts in the United States believe that sometimes, such use of an unsecured wireless network may be considered an "unauthorized access of a computer" which is prohibited under Federal law and even theft of communications. Legal causes of action which were cited include defrauding the Internet service provider and a breach of the Internet service agreement.
Alternatively, such actions may be deemed trespass to chattel. In addition, under certain circumstances, including a massive use of the network in a manner which effectively prevents its operation for the owner, it may be deemed as the unauthorized performance of a telecommunications operation (the unauthorized operation of the router for the purpose of granting access to the Internet), harassment using a telecommunication device or the disruption of the conveyance of a telecommunications signal, under the Communications Law (Telecommunications and Broadcasting). The breach of such section is punishable by fines and prison sentences. Theoretically, this is similar to the unauthorized connection into cable television broadcasts or the neighbor's phone line and the causes of action cited in lawsuits in such cases would apply.
However, theory aside, in effect, in most cases it would be difficult to prove and quantify the damage caused due to the usage of the wireless network. It would also difficult to prove the mens rea, purpose, required in the said offenses. This is because in many cases the connection to the wireless network is carried out automatically by the computer and the user only discovers this after a while, if at all.
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- Thanks Frank "clearly a lawyer" M! And props to those who answered with facts. It appears to be a gray area. I can't help but be annoyed by Biggie, Ryan and SugB, who say its illegal w/o citing facts. They're confusing a basleess moral argument - "free MUST be stealing" with current, vague, law.
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