Useless exercise by TRAI.
There is no distinction between telemarketers and the parties you do business with.
e.g. if i would like to receive transaction alerts from the website where i have transacted online; then i must enable the entire category i.e. Consumer goods and automobiles.
To receive alerts from banks, i must enable category 1 i.e banking/insurance/cards etc.
It clearly exposes TRAI's bankrupt mind.
I recalled a joke where a doctor asks a patient to remove all her clothes just to be able to show her ailing knee!