[TS3] A couple mod ideas, no automatic instruments, etc.

I was wondering if it would be possible to make a mod to stop sims from playing instruments if they didn't already have levels in the skill. I don't necessarily want to stop sims from playing instruments if they're the sims I've designated to play those instruments, but I had a sim visit and spend the night and I spent ten minutes telling her to stop playing the drums...stop playing the piano...stop playing the drums...stop playing the piano...

I guess it could be worked around if I made sure all my band members had their instruments in their inventory, but I don't feel like that should be necessary...also it would stop sims from making fools of themselves in bars.

The second mod I had an idea for is probably impossible, but I thought I would throw it up here anyways. I kept thinking it would be nice if EAxis would implement some kind of ownership system into the game, kind of like locking doors only with objects. I don't know if they would operate the same, but it's worth mentioning, I guess. Specifically, it seems kind of silly that sims go to someone's house and start dicking around on their computer. Or even in a house with several housemates using each others' stuff.

Like I said, I'm guessing this one is impossible, but figured I'd throw it out there anyways.