Counter argument; if people want to explore the map and get out to the map border, removing the ability to place obsidian forces them to walk the full 15k block distance which is both timely and annoying. I do agree that raiding through the nether is a little strong, but I still feel it should...
The whole process of quote creation is quite opaque to most on the server, so if there already is a method of taking funny quotes from the server like Ken's above, it would be really beneficial to make it more transparent, or more fun, like a monthly voting system where you suggest your...
My suggestion would be to have some sort of record for individual reacts for the fastest time, similar to parkour. Would make it kinda interesting. In terms of actual reacts, I would suggest to implement random funny quotes of players on the server.