To be an opinion-maker, age and experience are necessary. Otherwise, anyone can copy-paste stuff J Ralph Waldo Emerson says: "The years teach what the days never know." - However, this post is not meant to discourage anyone but to only lend a worthwhile thought.
Electronic media are definitely acting as opinion makers but there are opinion makers on "alternative media" i.e. The Internet also. If the users of Internet are not mature and lack experience, then they can be swayed by any view which is floated there. That is the main concern here. Secondly, to give opinions and suggestions on life, one needs a certain maturity and experience, otherwise it all becomes just gossip. In the old days, thought and opinion were only floated in "controlled" way and through books, digests, radio and TV with people of knowledge administrating those affairs.