In my opinion, people hide behind the "IMO" and I wonder if they do so because they are afraid of being attack for speaking their mind, saying something they feel is true, "IMO" is just a plea - it really means "don't hassel me for saying this."
There is only one to say about the greatness of Led Zeppelin - & I'm not going hide behind a "IMO"
John Paul Jones and John Bonham make up the best rhythym section ever, it's not an opinion it's a scientific fact!