Do you mean the fact that you believe them is ironic, or that you pretend to believe them to be ironic? If it's the latter, I kind of do this myself, more for the humor value. I especially love the more out-there theories, such as ancient aliens building the pyramids or raelians.
I used to believe in everything when I was younger; ufos, ghosts, psychics, mythical creatures, religious phenomena, you name it. There came a point when I could no longer reconcile my scientific knowledge with these beliefs, though.