Where are the Brakes for Old Earth Christians?

I am a young earth, six day, 24 hour day man. I believe this is consistent with the Biblical text and think science backs this up. I have friends who are old earth guys. One of the key questions I think OEC men need to answer is where are the brakes? What is not allowed in their system? What I have found with many OEC is there are no brakes. Anything is allowed as long as God shows up somewhere. Full scale human evolution with a view of God that verges on Deism. Death of all kinds before Adam’s sin. A fall that drifts towards the mythical. An Adam and Eve that doesn’t really exist. I know not all OEC men hold these positions. That is not my point. My question is if you are a Christian who is old earth what are the lines that cannot be crossed? What interpretation of the early chapters of Genesis would they condemn?

I do not believe every OECer is a heretic or is going down the slippery slope to apostasy, though of course some are. But if a system allows for any and all approaches to Genesis 1-3 then it seems to me it is a system with problems. So what is and what is not allowed by old earth Christians? When will an OEC man say to another OEC man you are out of line? Is the only criteria that God got the ball rolling? As long as God hit the first domino everything else is allowed? Is there any teaching on Genesis 1-3 that they would label a “false teaching and dangerous?” In my experience, while there is disagreement among OEC men on the specifics of Genesis 1-3, there are few brakes if any in the OEC system. This allows for false teaching to take up residence among OECers that has little do with the age of the earth.