Level 5 is the highest level for a guild, you go to the guild manager and upgrade your guild. For the bot issue, when you take in new members insist on the fact they you don't allow bots in guild. Further you learn a lot by reading the guild channel, botters like to talk about their stuff. If someone points you to a botting member try to check him out. Normally I go to the pot trader in town, wait till the player arrives there and put a trace on him. A bot runs in a very strange way, he advances, stops, advances, stops, etc....
Just go to a town and look at the people coming out and the way they move you will immediately spot the difference between a bot running and a legit player running.
