Basically I handle this by blocking. That is fine tool, and even better it wrecks gankers instancing.If you want to roleplay, use private group to secure that type of environment.
Do not expect total strangers to play along. They owe you nothing bar the expectation to not outright cheat.
There is a very simple solution that is available to use. If you choose not to use it, you are responsible for the consequences it brings upon yourself, in this case being interrupted roleplaying.