Well, what I'd suggest you do, instead of killing bottler, which would only make them reconnect, is 'disable' them from using your network. Create a line in your server's MOTD that reads:
no bottler clients please
If you have that, instead of just getting killed and trying to reconnect later, bottler will basically remove your server from its network list so it should never try and reconnect again. Imho it's better than using akill because this way your akill list doesn't have ~500 bans on it
