Blockers
Resolutions cannot be "repeal-proof"or prohibit types of legislation.
To summarize regarding blockers: being a blocker isn't illegal. It's being a blocker and nothing else that gets a proposal dinged. That, or closing off an entire area of WA legislation -- say, "RESERVES to nations the power to make all decisions on all matters concerning the human rights of their citizens and residents" -- or trying to write the "unrepealable" resolution: "RESOLVES that the WA shall never speak of this again".