Doooo it! Cross is about 2 things that I can think about: beer and cowbells. The beer helps you race and encourages you to ring the cowbell more. You just ride around in the mud for 45 minutes to keep the line at the beer tent shorter. These race organizers have thought of everything!
On bikes, see the following:
They even make flat bar cross bikes, clearly people like um and they work. I know some hardcore boys that ride rigid single speeds. I know a punk who built a Campy cross bike just to make old Tullio roll over in his grave. What matters is what you're comfortable on and whatcha got in the garage.
Sure there's a contingent of cross racers who get all super serious about their gear and they're awesome and it's their primary focus so good on um. Then, there are who wouldn't mind winning but just wanna have fun. So long as you're in that group, rock the hardtail! With streamers in your handlebars! Or be like this dude:
I wish I could find the pics from that race, there are more of him, one with a guy in a French maid costume giving him a funny look. Really, guy in a French maid costume?
"True, but if you throw your panties into the middle of the peloton, someone's likely to get hurt."