When you place the adsense ads in your website, after you got the backlinks to your website in any method, there is no problem. It won't count previous statistics. From the time you placed the adsense ads on your website, then you must not use any blackhat methods. If you use after you placed the ads, then you will get banned. May i know how you will get the 1000 backlinks? In which blackhat method?
Are you sure about this? Haha you need to know how to get 1000 backlinks? Well xrumer and scrapebox can do this for you. I don't think i will use those software.