I’ve clipped the RGB lights from multiple computer fans I’ve bought. Gawdy and unnecessary, and sometimes you can’t find items without them.

Don’t get me started on kids toys that are too loud!

Many toys can be physically dampened, but another way is throwing a resistor in parallel across the speaker. I did this with a Little People princess castle my daughter had when she was very young and it was quite a nice way to do it— same bright and unmuffled music when you put the dolls on the stand, but at about 20% the volume.