also it's ridiculous to DDOS something that is helping blockland. could you install DDOS protection or something?
There is no actual way to protect yourself against a DDoS attack if the upload speed on the attacking service is bigger than the download on the victim's host.
You could get some firewall that blocks the connection but by that time the internet line will be clustered up with packets trying to go towards the victim host. However, dedicated hosting services like servermania do DDoS protection for like $160 but that would be out of budget for any start-up blockland hosting service, as people wouldn't pay for the monthly subscription as it is too expensive.
This is why RTB went down, it's too expensive and too many people on Blockland hate each other, thus people not hosting a 100% up-time host.