I ended up doing something similar to this
http://badgerandblade.com/vb/showthread.php?t=54746&highlight=blade+bank
you can do that or buy or make a blade bank. Westcoastshaving sells cheap ones if you don't want to make one yourself.
I would not throw any razors, even those contained in a blade bank or sharps disposal in the regular trash, as this poses a safety and health hazard to sanitation workers and animals.
i break mine in half and push them into my ears.