Indeed, if you are not sure whether google will ban you or not, then most probably you are not ready to use the tool. It doesn't mean that you should never do it, but do some more research, read and try to apply it bit by bit while always tracking your progress. I should agree with MrMac, it's not about what you do, it's how you do it. So, do it carefully and proxies would also be a good idea.
Plus, my suggestion is to not go solely with black hat tools, but use them to spice up your white hat tactics, especially if you aren't yet sure of what works and what doesn't.