I think it would be good idea to eliminate the ability to randomly drop items for the following reasons:
1. It would prevent people Holla-ing "mod please help me get back item x! I dropped it in my friend's realm and he/she stole it." Yes, I know that those who drop things are mostly fools, but some are just children who don’t know any better. You can always use /trade if you need to give a friend something.
2. It would keep the lobby clean. I am getting pretty tired of wading through garbage every time I go to the farm center.
3. If you are concerned about carrying unneeded items while mining, I suggest a trashcan (or two) be placed at the mine portal for disposal of blocks you don’t want to carry.
Thanks for taking this into consideration.