You guys have a really really really annoying opposition to anything larger then a rocket.
The reason the Ion Cannon is failed is because it was scripted horribly, had an obnoxiously gigantic model, and it spammed errors into chat when a server starts.
The reason the mini-nuke was failed was because it overwrote the damage for the Rocket Launcher.
Both of those weapons aren't very well suited for multiplayer conditions due to the large explosion and abuse, but take in mind that people who haven't bought the game yet can use addons whether or not they are planning on hosting a multiplayer or LAN server. Banning modifications from use just because they aren't fit for multiplayer servers isn't fair. He isn't asking for either of these addons, which is why he's posting a request for a new addon. One that preferably doesn't have the aforementioned problems.
This is a classic example of Bandwagon Fallacy.
Leave this kid alone.