"They are suing google because they claim google went onto a private drive to take the pictures."
Yes, but the real reason they are suing is that the photo proves the owners have done almost a hundred thousand dollars of improvments and not reported any of the work, nor had it approved by an inspector. They rebuilt/expanded the garage, put in a pool and deck and some other things. Those all increased the value of the property from about $85,000us to an estimated $200,000us. When their county auditor found out, they sued to back taxes, liened the proptery for uninspected additions, etc.
In short, the people who sue google really are upset they got caught doing something illegal, immoral or just plain embarrassing (to themselves).