Again, it's not rocket science stlhead.
Sure, historians, theoligins, biblical scholars, etc have generally accepted prinicples they follow to study translations in order to get to not just the meaning of each word, but the ideas being presented in light of historical and cultural contexts.
But all that aside, the average guy like you and me has plenty of tools to study and interpret the Bible. It doesn't take long to realize you can't just pick a few verses and think you know what's being said. That's why they call it 'studying' the Bible and why Christians are involved in self lead Bible studies as well as group Bible studies.
You can usually spot the 'church leaders' or 'denominations' that have some kind of agenda - they are the ones who don't encourage their congregation to actually study the Bible on their own and who just preach their own message down their throats and pick and choose a few verses to 'support' their ideas.
The dangerous people are those that have an agenda and use the Bible as a way to manipulate people (as has been done
throughout history including today. Just watch those idiots on TBN with their 'Crystal Palace' or whatever...). The other dangerous group are those lone individuals who casually pick up a Bible, find a few verses, and think they suddenly understand everything...
As Christians, we have learned to study on our own, compare and discuss studies with others in our church, compare our findings with various respected scholars and church leaders around the world, and I know this sounds hokey, but we are also guided by the Holy Spirit. We don't just rely on any one of the above - but we combine all our resources and in the end it is our own logic and reason that takes the data given and 'interprets' the Bible. Some take this much more lightly that others, but for most, it is a serious matter.
I don't just blindly follow what someone tells me since I know that there are those with agendas - whether that be power, prestige, money, are simply to deceive as many as they can to keep them from actually understanding the word of God.
Anyway, all that just to say that I give about as much credit to those who say 'my interpretation is all that matters' about the same credit I would give to the guy who wets his finger, holds it in the air, and tells you what the weather will be like tomorrow. He may be right, but there is much more to studying, gathering, and interpreting weather data than that kind of shoot from the hip approach.