There are limitations but frankly the line isn't clear as I would like it to be. My last job said anything I create using the tools provided to my (my laptop)

There are limitations but frankly the line isn't clear as I would like it to be. My last job said anything I create using the tools provided to my (my laptop) could be subject to their ownership. My newest company goes a step further and says anything I create in my spare time becomes theirs. Their actual statement was, "Let's say you create the next facebook. Then that's our property." Of course after explaining to them that I was "helping" a friend build a specific web site they said that wouldn't be included as it is in another business sector than they function in. The odd thing is that facebook is not in their sector either. So again, my main complaint is that the line isn't as clear as I'd like it to be for my tastes.