The other day my daughter came to me and said she could not get on-line with her computer. She was using my sons account, which was fine because he was not home and naturally not using it. I try the computer myself and get an error telling me that this account is in use, access denied. after determining that the computer is set up right I go to my box and log into the system ( I am the Director of the ISP with full admin rights ) I check to see who is on-line and lo and behold it says my son is on. Knowing he is out of town I immediatly go to the radius logs to look for anomylies, I see that one of my sons friends (whose account recently expired due to non payment) tried to log in several times without success, then I see his attempts at trying other combos of user/pass. Then by sheer luck he stumbled on my sons combo and was on-line, and had been for over 250 minutes. So, first I just thought of booting him off and changing the password, that was too easy and that would just entice him to try harder. So I remembered "net send" So I sent him a message that read:

You are Ilegally logged into another user's account!
Your IP address is xxx.xxx.xxx.xxx. Your call is originating from (I inserted his address here)
And your phone number is xxx-xxx-xxxx. An e-mail with this information is being sent to the Administrator of this network, and copies are being sent to the local authorities and the F.B.I.
You will be prosecuted to the fullest extent of the law! Have a nice day.
In less than 5 seconds my "son" logged off. I asked my son later to go by his friends house and see whats up. He came home and told me that he had formatted his hard drive, disassembled his system, and had it hidden in various places around the house. My son just rolled on the floor laughing at him, when he asked if our system had automated security.

I have not heard from this kid yet, but my radius logs are almost clear of attempts of hacking into the system, I Believe that I found the skiddie that I have been looking to nail for months.