I don't beieve this potentional threat was ever going to be carred out seeing as the user said 'I was seriously going to boot him offline' implying he was no longer thinking of DDosing you.
However the user has been infracted and suspended for a day. Also the user has been firmly warned of his actions.
A friend of me made quite some money when .xxx was released and he bought the most obvious search terms by little kids when he still had the chance.
It's hard to find good domain names and estimate what they will be worth.