The topic of this thread is Why I'm Still Catholic (And Why Other People Aren't). There are plenty of warnings throughout the Bible about "if any man brings gospel other than what we have preached" and "don't add to or take away" type of stuff and I get the feeling they were put in there for a reason. Man wants to tinker with what Gods plans are. It happened in the Garden of Eden and it happened in the SCOTUS today. My postings are in the spirit of what this thread is titled. Don't worry about what I think is binding on Catholics, worry about what God considers binding.
Catholics do not add to or subtract from scripture, but they do recognize sources of authority in addition to scripture.