I would agree with you @Rennie245 but alas there is this issue…people seek out help and questions and refuse to use websites to find those solutions so they use shoutbox for that, I do however think J2 or J3 should be the restriction as it atleast means they have to progress to some degree before being able to purchase and or use the item of mention.
Another solution is just to 75 character limit the item so that they can only say so much or maybe even a 45 character limit…
All in all though there is no good way to handle bot spammers like this in this kind of game. If we could personally disable the shoutbox that would be ideal, obviously you would not want it auto activated as no one would turn it on in general as they would be unaware of it, correct me if I am wrong on that though…
My solution is this get more GMs to handle shoutbox’s or disable it until you can find a solid solution to atleast cut them down to some degree other wise the economy will turn to rubbish before a solution is made.