Which Rules?

[Clay Davis]

I am looking for some advise on which rules to apply:
 
Where are the guidelines for (not) applying rules like antidrug.cf?  I
see the header stipulates that it is not intended for v3.0 and higher. 
If these stipulations exist, are they always found in the comments of
each cf or can I find this information in a more consolidated location?
 
I've had antidrug.cf for a while and kept it after upgrading, but I see
now I may have been reducing SA's effectiveness.
 
Thanks for you help.
Clay