yes, that's pretty much the state of things in the US. Anyone can file a lawsuit for any reason; granted if someone files for something stupid it will almost certainly be laughed out of court immediately, but you will still have to spend time and money defending yourself from it.
And this is in no way limited to companies. You can be sued for asking the guy behind you in line to talk into his cellphone quieter. That'll almost certainly be dismissed with prejudice, but you'll still need to either research the law yourself or contact a lawyer to deal with that idiot.
