keeps texting me when i text back who are reply add me any idea who this is will not tell me

started with "Hi :-)", replied "Hi?", said "add me on yahoo abigflirt71"
It's gotta be another scam!
Pretty sure you get charged 2x when you text between your cell and yahoo messenger.
I'm in AZ, btw.

Got a text, Hii!  they got my auto respond, then got
:) A.dd me on y! msngr .. sn is maddisonsmile4  ,
I responded who is this,
they said sorry I have no reception ;(

I just received a similar text message saying "Heyy :P"  I asked who this is, and this person replied " ;) a.dd me on y.a.h.0.0. msngr ... ID is brynnflirt".  To which I replied, "And again I ask who is this."  No response from texter.  So my last message said, "If you don't tell me who this is, I am going to post your number on Facebook for all to see this text message.  And then they can send you random text messages and harass you."

I got a text from this number saying "Hii;-)" I said I didn't know the person and they said ":) A.dd me on y! IM ... id is tatyanasmiley5" I sent them the info for me to block them from Verizon (as if to say, stop jerk) and they responded with "sorry I have no signal :(" So...I blocked the number.