A five steps thinking process for all today. 
Step 01: Fact 01: Many people complain about the rating system.
Step 02: Fact 02: Many people question on what is art.
Step 03: Question to all: Define what is NOT art or what is the opposite of art?
Step 04: Question to self, after answering the above: Judging on what is art and what not, don't i just rate?
Step 05: Conclusion: Why complain in the first place?
PS 01: Be honest up to Step 03. Then highlight text for steps 04 & 05.
They are written in white. Don't cheat now that you know.
PS 02: I hope i don't get spanked for this.