Leveraging "load->_ci_cached_vars" array in libraries

[eluser]neal789[/eluser]
Just wondering if anyone sees any downside to leveraging the _ci_cached_vars method of the CI_Loader class as a substitute for passing variables from my controllers into library functions?

It seems like I could clean up my code a lot and not need to worry about passing in session information to libraries if I just access the load->_ci_cached_vars array within my libraries to get user information. Can I depend on that array being correct? Is there any downside or risk?

Thanks for any input.