Because it’s available everywhere e.g. work/family/friends etc. and I can share it with family/friends as well. It’s a lot of fun to see people’s reactions when they see what the net can be like without all of the ads.
DNS Amplification Attacks: https://www.us-cert.gov/ncas/alerts/TA13-088A
> A Domain Name Server (DNS) amplification attack is a popular form of distributed denial of service (DDoS) that relies on the use of publically accessible open DNS servers to overwhelm a victim system with DNS response traffic.
DNS queries are much smaller then DNS responses. Making a huge amount of queries uses less bandwidth then uses to respond - making it a prime candidate for DDOS attacks. Look at your logs, no doubt you will see a large number of requests for various hosts. This is your system being used to attack people. Please close the port.