I'd consider that type of issue a common problem for many hobbies.
Wanna really tick off a cook? Scrub their well-seasoned cast iron pan with steel wood until shiny. ("Now doesn't that look a whole lot cleaner?!")
Or how about picking up a vinyl record with your fingers on the grooved surface.
Or "helping" a gardening fanatic by pulling out some "ugly weeds."
Or wiping the dust off a car belonging to an auto buff with a dry towel.
The list is probably endless. Be thankful that in your case you can move your speakers back and no permanent damage was inflicted!
Wanna really tick off a cook? Scrub their well-seasoned cast iron pan with steel wood until shiny. ("Now doesn't that look a whole lot cleaner?!")
Or how about picking up a vinyl record with your fingers on the grooved surface.
Or "helping" a gardening fanatic by pulling out some "ugly weeds."
Or wiping the dust off a car belonging to an auto buff with a dry towel.
The list is probably endless. Be thankful that in your case you can move your speakers back and no permanent damage was inflicted!