Your "warning" bans did not proove effective today. There has been spam for hours. When you're dealing with people like this you need to make a statement to them straight up and to the players of the server to show no stuff will be taken. Yes sometimes you come across as strict but the unfortunate truth is it works. Maybe you were not present the other day when I said this so I will say it again
Banning someone is like punishing a child, if the child misbehaves and receives little or no punishment they will not learn. If you are more strict with them the first time round they are more likely to learn that what they did was wrong and are less likely to do it again therefore you won't have to punish as often.
Danny, I never warning banned the spammers the OP mentioned, I cannot ban someone when I'm not on the server or even the computer. Those spammers were on before I was, I had no idea they were spamming until I saw this topic, and then they had left by the time I got on. Also, the two people that spammed while I was on and that I banned while you were there have not come back on and spammed again, even though the hour ban expired awhile ago. Please get your facts straight with me before posting stuff about how my bans are not working.