Other than opinion and commentary that frays and/or cuts the Bonds of Unity, I am hard pressed to think what value there is in choosing those sites to post from. There is not a dearth of sites in union with Rome; and, they cover the same material but from a Catholic viewpoint.
Remember if God can speak through Balaam's ass he can speak through other asses as well! :)
LOL
Nevertheless, if someone posts from such a site and does not at some stage state a disagreement with any of the contents, they should not be surprised if people assume that they do agree with said contents.
To expect otherwise is to be irrational. I always conclude that when one posts opinion pieces that essentially call the Pope a heretic that the poster is in agreement with that opinion unless he states otherwise.