How can I protect myself from my mother and DCF?

Okay, I hope somebody can help us with this problem.Here is whats going on, back in Jan. of this year me and my mother got into an argument and the next day a worker with DCF was at our door.The DCF knew information about me that only my parents and fiancee know.So I know that is was her the reported us, DCF opened an investigation on us for 60 days and had Youth and Families Alt. come in 2 time a week.One of the YFA workers told us that it was my mom and my sister who reported us, but that they had found no indicators and that our was doing great.After that DCF closed out the investigation and we thought everything was over.Well that was 2 weeks ago and this is now, because she called us in again this past Monday.And again DCF investigated us only long enough to look at some pics on Myspace and to send in to take a monitored urine test and then they closed the case out again.When we asked who called , she of course said that she couldn't tell us who call, but that she could tell us that is was the same person who previously reported us.Then we asked what would happened if they called again and she told that we have to go through this all over again every time that anybody reports us no matter if they do it one time or one hundred times.She said that they turn it over to the state attorney after three times, but that it is up to them to prosecute her or not.We Even called the DCF worker's supervisor and she basically told us the same thing and said that she can confront the person making the reports, but that is all that she can do, but they still have to investigate the report.So we just want to know how we can stop this revolving door of investigations with DCF and/or stop my mother from reporting us every other week.Because we don't think its fair that someone can just keep making false reports and having people sent out to our house going through our house and taking pictures or us our child and our house.Plus sending us in to the courthouse to stand in a room with mirrors with some one standing there watching us urinate.We live in Polk county, FL it that helps with any of the answers.