Then a sensor would help prove your point.
Right now I can take my phone in and they say "did you get it wet?" and I say "Check the sensor!" and they know I'm telling the truth.
Wouldn't you like to have been able to answer the "did you crack it by dropping it?" question in the same way?
I sure would.
Same thing I was thinking.
Ok. Maybe I can make this clearer:
If it's software on the phone it's a little more robust than a piece of tape that changes color. I'm sure it'll probably even track times. They could use this information to, not only deem whether or not you dropped your phone, but whether or not you dropping your phone was related to the damage.