Given that APT has the power of the super COW and this should be amazing.
There's a simple, elegant and working way (because I tried with pin solutions proposed as well as the preferences file, and they don't work) to tell, hey check all the sources.list repositories, then if I have any packages that are ABOVE the maximum version available from the sources.list rollback the installation up to that version?
A perfect fitting example is that I found that the Ubuntu 14.04 LTS cd installer AUTO enables the backports repository, something that I really don't want. However doing so I already found the machine after a first fresh installation with kernel 3.19 when the default for Ubuntu 14.04 LTS is the 3.04.
For this reason I enabled only Ubuntu main and Ubuntu security and I would gladly remove/rollback all the backports packages back to what it was without backports repository.
How can I do this if is true that APT has the power of the super cow?