Death is a tool that can be used in RPs, just like violence, love, rape, etc. are tools. Some RPs put more value into each such tool, others put less. We personally like having limits on how often each of these tools are used. If a tool is overused, it'll lose its value for that RP. As a foundation for promoting action, few things are as powerful (and dangerous) to use as rape can be. Using it wrong can break both stories and characters.