[quote="Fone_Bone_2001, post:8, topic:254795"]
It can be derogatory but is not necessarily so.
I personally find it mildly derogatory - though forgivably so, because the person is trying to be honest - if it is used in a fully conscious effort to resist on a terminological level the fact that the Catholic Church simply isn't principally defined by the fact that the supreme pontiff is also the bishop of Rome.
That said, when people - it's always non-Catholics - use "Church of Rome" to refer to the Catholic Church, they are self-evidently and unarguably abusing the proper terminology. The "Church of Rome" is a particular church, i.e. diocese. I am a Catholic, but these people will just have to learn that in no sense am I a member of the Church of Rome. I am a member of the "Diocese of [my home city]," not the Church of Rome.
The term "Church of Rome" can't even properly identify the whole Latin Church, let alone the entire Catholic Church.
We call ourselves Roman Catholics though I would generally just say Catholic unless I had to be specific.
This wikipedia article indicates the connotations of "Romanism" en.wikipedia.org/wiki/Romanism
And of course, there is the book "Catholicism and Fundamentalism: The attack on Romanism".
So, I think Fone Bone's observations are spot on.