Damned: The item dropping glitch is mostly because, like damage, boats, etc, theres a lot of things handled client side that haven't been moved over to server side (since notch apparently is writing the games multiplayer backwards). Its nothing that will break the server: The server doesn't HANDLE it. I just started running the server so I dont know the details about what the duping does and what problems it caused. I got my info from fireslash, who himself isn't sure if its still a problem or not. He had asked people not to dupe, so we were too. This was a rule that was instated before the server migration, when the halloween patch came out. I don't really know what all the fuss is about though, I can't see anywhere in the thread were anybody has been directly hostile towards you. Most people are joking around actually. Calm down a bit!
I'm sorry that you feel the game is limiting your creation, but as the above poster stated: We just dont want the server to come crashing down. This new one isn't exactly as stable as the last one, we hit RAM ceilings a few times our first few days, though Multiplay has fixed that for now