This is also, in many companies, what the lead up to an internal blacklisting looks like, especially when said company has a dysfunctional technical management. Entrenched players (competent or not, mostly the latter) who may have been involved in the original iteration of a software project and/or architecture in many cases do not take too kindly to someone who is willing to rock-the-boat and challenge their authority.

I'm a big believer in doing the right thing but all I say is tread carefully because you can and will get burned if you do not take into account the dynamics of a company's internal politics.