Be careful advertising in local chat
It's a great way to gain additional members, but do be careful advertising in local chat! Do not repeat your message in the same district. You can shout your message once and then switch to another district to shout the message again. But do not shout your message more than once per district.
If you stick to this rule, you are safe from being banned or suspended. If you are still suspended (as happened to me once), you can appeal to it and you will win. Just show this link in your appeal:http://wiki.guildwars.com/wiki/User_tal ... rrectly.3F
It is Gaile stating you can advertise (legal) sites if you stick with one message per district. In short, it contains her written consent.