SMS limited to 100 per day

Indian Telecom Authority capped a limit for sending sms that a sim owner can send only 100 sms per day. This decision is taken for stopping unwanted marketing messages and spam messages receiving by the mobile owners. But experts too saying that, there is not a full surety that spam messages will stop completely by putting this limit.
Then this limit for sms is good or has any advantage?

People who cannot speak or hear do communicate with their friends and relatives through phone messages. What advantage for them to take on this limit? Their association already came requesting that at least exclude them from the 100 sms per day limit system.
Their request is genuine.
Discuss..