Maybe Pia's reaction was justified but only to a certain extent.
But please stop drawing parallels b/w VD n this show. Did Elena realise that Stefan could be more than just a normal human being before his truth came out? NO. Did she do an elaborate research like Pia to conclude that he's a vampire? NO. Pia herself says to Abhay in the cave after he kidnaps her that he died along with Maithali 200 years ago. So what should he be other than an undead if not alive? Also did Abhay ever let her get close to him? NO. Infact he tried everything possible to keep her at bay. He even told her that he's worse than a blood sucking monster, n that he doesn't have a heart. What is worse, he even took up the blame that he knocked up a gal n then dumped her.
All I am trying to say is that even though Pia's reaction was natural she went overboard. Abhay's fans obviously felt bad for him. Anyways things have kinda cooled down na? It'll be OK. No one will bash Pia anymore. So end of story. Relax.