I suppose creationists would say that God deliberately tinkered with physics including exponential radioactive decay constants along with all the other sound scientific methods that put the age of the earth at around 4.54 billion years, just to fool us silly humans who are taken in by real evidence. 

My, what a mischevious sense of humour he must have doing all that, then putting all those fossils in the right order back to bacteria in pre-Cambrian rocks about 4000 milion years ago, drawing a load of 40,000 year old cave paintings, and faking goodness knows how many ancient things!

If I had to choose, I'd be more inclined to believe that Slartibartfast really did design the Norwegian fjords