In accordance to the prophecy, I have disposed of them in the proper way:
1) Build a boat with said rubber dome keyboards
2) Wait for your beloved mechanicals to somehow break (operator error, water damage, messed up solder job, etc)
3) Put the mech board into the boat
4) Put boat out to sea
5) Use a bow and arrow to light the boat on fire, ensuring your board will be in Valhalla waiting for you
6) Play appropriate music for a Viking funeral, I like Amon Amarth
I feel like I'm the only person who read the prophecy when I joined Geekhack...