Math is fun, not boring. Also, yeah, there are algebraic proofs which were discussed earlier this thread (and all the previous threads on this), and have the benefit of being much easier to understand for a layperson. The calculus proof just allows you to demonstrate how an infinite string of 9's after a decimal does, in fact, equal 1.

This debate was apparently so ubiquitous on the WoW forums that Blizzard even made an announcement a few years ago on its website that .999... does, in fact, equal 1.