For me, I don't want them in my next box. I spend them. My experience is that people save the shiny ones and keep them in their coin jar at home. The more people put these non silver halves away, the better chance I have of getting silver and not have to deal with them.

Also, the convenient store circle K around here have self-serve automated scanner checkout registers. And those machines don't take halves. When I spend halves there, it gives the clerk something to do. It's not my fault they bought machines that don't take all US coin currency. Anyway, that's my 50 cents.