Record the last time the track started playing, and only play it again after a certain interval.

Yes, please do this, the song usually starts and doesnt end for like 5 minutes straight even though we aren't in boats anymore.

By the way, in commit e78f57e, I added an undocumented config option called piratesCooldown. If a long number is specified, it will be used as the milliseconds before the pirates track can be played again. If no config option is specified, it defaults to 5 minutes.