Can matching of crypto addresses to real id be of any use?

[asonganyi]

 A friend told me about a service similar to Gravatar but just it doesn't match emails to ids but crypto addresses to ids. So my question is does it even worth it?. Is the service needed? even if it were for free?

 If this service is needed somewhere then it can be done at almost no cost on the EtherZero platform since it has 0tx fee.

 basically if for one reason or the other you need to identify your address and you use a crypto with the ECDSA encryption algo then this can be done at no cost. Another question, how often would this need come in to play if at all it is ever needed.

 thanks for you reply