This is to protect ISP's business (Score 1)

No one cares whether or not you want random people using your wireless network. What they're upset about is that people are using your internet connection for free when they ought to be paying your ISP for their own connection. In their minds, this is the same as stealing cable TV- something they've been telling us is bad for years. Is it a fair comparison? No, not really since I'd venture to guess that most squatters are paying for internet access at home so I don't think the ISPs as a whole are really losing money by this, though I'm sure they think they are.