Perhaps. Not sure I believe that as I've never once noticed the LED light as part of my buying decision. Now that I'm wary though, I will avoid devices that seems to have bright lights and have returned things specifically for that reason. Not that my behavior is average but feel like at the least, nobody is testing things to see if they blink before they buy them (many small electronics are bought without ever seeing them tested/demo'ed).

I have had many things over the years that have internal lights, for no apparent reason, but they glow out of the box. Eg, like an old DVD player that glows through the case. I'm sure this is for maintenance as it may blink or light a certain way to communicate error codes, but if you're the one building this in - I would think OFF would be default and could enter some debug mode or something from there, or start blinking when errors occur.