<human>: Provide a brief overview of the text.

I had a really bad breakup around a year ago and I just couldn't cope with it. He used me even though he already had a new girlfriend. 

I now decided to tell the new girlfriend about his cheating with an anonymous message on facebook. I know that is not a really nice thing to do... but I needed to do it, to find closure. 

However he found out that it was me and he sent me this message:

Please could u stop sending msgs to my girlfriend ... u re wasting ur time...we exactly know where those msgs come from .... we re even keen to track th IP address and we ll have th final proof to take u to th cops and accuse for harassment. In your free time i suggest that u read about th punishment for harassment .Bronwen can explain u what i am talking about..

Is it possible for them to track my ID and charge me with legal consequences?
<bot>: I sent my exboyfriend's new girlfriend an anonymous message that he cheated on her with me and they found out that it is from me. Is it possible they can take legal actions against me?