I have seen the Tanya to die campaign. Meera has reached her limits in being bad..so she has to die..jsut like how Aditya gujral and Ansh. Why Tanya should die? She did not becoem negative though she loved Karan and though she know that Karan love Nandini only.
She married karan because including the experst doctors said that Nandini can never come out of come and there is not home. Everyone in the family didn;t wanted Bhoomi to be mother less..so she took that responsibility.
All the while Karan said that Nandini and Tanya are two loves of his life..and now he mentions only Nandini..this is very bad. Even now Tanya says that she will leave him as soon as Nandini comes back. I think she will jsut pass away naturally finally when Nandini is back...but we cannot wish for her death. Now she is in Shantiniketan..as her kids need her.
She might have made mistakes in bringing up the kids..but they r not as bad as Ansh atleast. Atleast these are not the reasons for her to die...though its jsut a character in the serial...its not correct to wish her death.