There have been a number of discussions raised about this. How about some examples, with reasons why they shouldn't have been migrated?
The reason questions you don't like get migrated to Programmers is because people don't always understand what Programmers is about. This shouldn't be surprising, given the history of Programmers.SE.
I am a moderator on Stack Overflow. That means that I have to not only know SO's charter, your charter, and the charter of a handful of other sites like Drupal, Tex and Linux; but also the current gestalt of those websites (i.e. what have people been discussing on meta about on-topic-ness).
Needless to say, there are a lot of moving parts to migrations. So when I get a flag requesting that a question be migrated to programmers (especially on questions that have no close votes or only off-topic close votes), I'm inclined to honor it, if it doesn't seem like an unreasonable request.
To be honest, I would expect about 25% of such migrations to fail. It's not a perfect world. But providing some examples of questions that shouldn't have been migrated, and the reasons why they shouldn't have been migrated, might go a long way towards improving the migration success ratio.
One example per answer, please.