Ok, tell me if you like this one better:
Since the earth is flat, the scientific community is either lying to us or just plain wrong. Why would I bother myself with the "rules" of such a community?
And anyways, the burden of proof business only applies if I'm trying to actually change your position; I'm not. I'm only out to show that my belief is no less valid than yours, whichever the "accepted" theory may be.
If you want to just sit in your chair, cross your arms and say "Prove it", then you're going to get awfully lonely.