How will it damage it? I've been sticking a piece of scotch tape over
the
piezo speaker in PC's to make it quieter for at least a decade, never
had
one fail in any way and it makes it much quieter.

What piezo speaker inside a PC?


90% of the motherboards I've come across in the last decade have a piezo
speaker soldered to them rather than needing to plug in that paper cone
speaker on the case. It's only used for beep codes these days anyway.