I would definitely toss them!!!!! TOSS TOSS TOSS !!!!!!!!!!!My first ones I tossed onto the counter,then tossed them into a pan,then tossed onto a plate and then tossed into my mouth. So just toss your eggs this way for proper disposal. The very first egg I got, the shell is in a mini flower pot on the window sill in front of the sink. Couldn't even bear the tossing of the shell, nevermind the whole egg.
I think the whole thought process is that when they first start laying is that if they are on medicated feed that it will also be contained in the egg. If you go by that you probably shouldn't be buying milk, meat, cheese or anything from the store because who knows what the heck in those.