My idea: don't use the /votemap command. Soldat is a game, and using UI rather than CLI speeds up and makes the game a lot more enjoyable to play. If the only way to buy weapons was to do /buy <weapon-name>, wouldn't you like if a buy weapon menu was implemented? (rhetoric question btw, so people don't try to be funny)
The situation I'm suggesting is when a user has a ton of maps, and remembering the name of every one of them just so he can use the votemap feature isn't easy or worth it to the user.
It also wouldn't be hard at all to code (for anyone who uses this as a reason to f11 this idea).