How to spot backdoor addons?

If you have something that is in the files that does not have relevant material to what is being used in everything else, it is a backdoor.

Let's say you have something that is calling to use for something, you have something for it to determine off of earlier in the script that develops the line and functionality of it, then comes in to have it relevant again, but is tying something else in it to come through with it then it is made into that script as well to make it all function together as like almost a "cancer or tumor" in the script as all part of a 'total dynamic revolving script'.

If you know what you are looking at, you will be able to immediately determine what I am talking about... in most cases the whole script will be tied to this that if you find it and do just remove it, nothing will work.. you may have to rebuild the dynamics of the function for the whole overall script to perform. Good luck!