Sometimes those comments are meant as jokes (though tone and intonation carry REALLY badly over this medium), though often enough, I hear that from people confused (or worse, think they know all there is to know) about digital signals and therefore, I'm direct in stating my opinion on the comments.
It was not meant as a direct attack on you personally (again, the medium does not allow for tone), just as a statement, since I thought you were completely serious, that it's not appreciated.