The high pitch tink tink is more noticeable when idling or "lugging" the engine. It's also more noticeable by younger ears.If your older or never thump around trying to impress girls by doing 5 mph in top gear you probably will not notice a huge difference.Note if you DO like them it may not hurt to remove them and put them back on again with a stronger glue. They tend to fall off over time.
How about a pet peeve? The bar code sticker has to go. So many pictures of polished side cases, extra chrome, lots of detail and hard work to make ones bike look even better, with or without the rubber things and that blasted bar code sticker still lives! Even when the black lines have been smeared by solvents or gas spills, the sticker still remains. Please remove and I'll be able to sleep in peace.