To be clear, you can consistently argue that all opinions are subjective, but this requires some pretty radical claims. For example, try accepting the following: "It's my opinion that A is both A and not-A (in other words, lol law of non-contradiction)."
Basically, opinions about things can be wrong so long as there's some external reality corresponding to them.
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http://www.youtube.com/watch?v=SBpfwpOPXNc&NR=1&feature=fvwp
I watch Planet Chasers Starlight Excellent all day, every day.