I know a lot of people requested this but I think it ruins the point of bots. The idea is that they can mimic a human player and putting something in their name just gives it away.
It does not help to increase the number of players playing Nexuiz, it will decrease it. Picture this situation:
A new player is browsing for a server. They see a server with a nice low ping with 4 players on it and join. They then have hours of happy gaming without really realising that they are playing against bots.
If the server had [bot] in the name of all of the bots, the same new player would join the server, see they're all bots and leave. They might do the same on lots of servers, think no real people play the game and so go and play something else. That shouldn't be happening so [bot] in botnames should not be on by default.