Ask HN: How to deal with mechanical keyboard users in an open office plan?

Hey -TAKTAKTAKTAK- does anyone have any advice on how to deal -TAKTAKTAKTAK- with mechanical keyboard users in an open office plan? It's getting out of hand and asking them to use a regular keyboard is -TAKTAKTAKTAK- not working because "they are much more productive".

How to politely deal with -TAKTAKTAKTAKTAK- this situation?