Namaste,
>to things as esoteric as tAntrika rituals and practice (which vary widely and 
>are
>unique to each sub-tradition) 
If discussions on purANa-s, itihAsa-s are allowed why not the discuss the 
tAntrik rituals ?
Your statement IMO does not make much sense. Or probably I did not understand 
completely what you say.
Regards