When it comes to SEO, there's no way to "trick" the system. There are certain ways to improve your ranking for a day or two, but eventually Google with catch on and your website will be punished for it, making your ranking disappear. How do you know if what you are doing is "legal" or if it's something that will hurt you in the future?
Here are the "Ten Commandments of SEO", AKA the ten things that you should never do when it comes to SEO!
If you are conducting this "Black Hat" SEO and Google hasn't punished you yet, don't think you have gotten away with it, Google will find it soon enough!
If you want to appear on the first page of Google, don't try to trick the system, work with it and your SEO will improve.