I know the Earth's axis naturally changes as it rotates, but what would happen if it tilted outside of the normal parameters?

Would we be knocked off our orbit around the sun? Would our rotation speed change? Could gravity be affected?

Lately the recent topics about the strange appearance of the moon, earthquakes, and pole shifts have kept me wondering if the earth's angle has changed more than it ever should.

Post your theories and answers, I'm interested to know what people have to say :)