Captain Anorak's Guide to Gaming
Common Offences against Sanity
There are some ideas that are very common in RPGs that are utterly utterly ridiculous and they horrify me. Here I rip them apart and spit bile over their mangled remains.

Simple 'To Hit' Rolls.
Experience Points and Uncontrolled Stat Growth.
Combat without Consequences.

Purposeless Monsters.
Ridiculous Scenario Hooks.
Wandering Fantasy Adventurers.
Dungeons.
Oracles.
Carrying Characters from Game to Game.

The Evil of Retconning.