I recall during OSI that when you locked down special instruments such as bells, others could play them/access them to hear the sound (there were 12 different bell sounds on OSI). I think that would be a nice add here (if easy) for the bells, baracoon's flute, etc... to allow them to be played if locked down. Normal instruments can be played locked down.
This would be a nice addition. Maybe we could extend this to monster statues as well? If I remember correctly, bells were also activated just like monster statues(coming in proximity). That staute/bell sitting out front could be your doorbell.
As long as the rare instruments don't wear out from this, I'd be okay with it. If the Baracoons Flute went poof from some random 2x clicking it, I'd be a bit disappointed.
I don't see why they would, considering double clicking even normal instruments causes no wear, only when you use them for a barding skill