"Are you going to come quietly, or do I have to use earplugs?"

This quote by Spike Milligan is a humorous way of asking someone to work together. It implies that the speaker is willing to accept the other individual's decision, however if they do not come silently, then the speaker will need to take measures to shut out the noise. This could be interpreted as a caution that if the person does not comply, then the speaker will act to make sure that they do not trigger a disruption. The quote also suggests that the speaker remains in a position of authority, as they are the one making the demands. It is a funny way of asking somebody to comply, and it indicates that the speaker is willing to accept the other person's decision, but if they do not come quietly, then the speaker will take procedures to block out the noise.