Mary a fact is something that is not refuteable and the truth sometimes is not a fact. You state you post the truth but with your bias you have articulated on so clearly, I have to ask just how you know what the truth is and SLAPP allows you to not have to know so in a sense you can make up your own truth and if you can get it posted enough some will actually believe you and never have an underlying bias to support their version of the truth.
I try to deal strictly with the truth but there is no assurances I am telling the truth or that I know all the underlying facts to arrive at the truth. Some people fabricate truths on both sides. SOme for financial gain some for just flat out meaness and have nothign else better to do.