Setting taintLog to 1 definitely increases crashes astronomically for me, giving the lstorminterface.cpp error. I cannot even load my UI with virtually any addons when taintLog is 1.
When taintLog is 0 I still get lstorminterface.cpp crashes sometimes, but less often. Doing a reloadui seems to greatly increase the chances of a lstorminterface.cpp crash even with taintLog 0. Also, I feel like alt-tabbing out of WoW (using windowed fullscreen) while it's doing its reloadui loading screen increases the chance of the crash somewhat, but this is mostly intuition at this point.