I don't support IP blacklists in general, but I recently read something that described a seeder as a crawler that records nodes and "bans nodes after enough failures, or bad behaviour".
That's from sipa's bitcoin-seeder, which was used as the basis for Litcoin's seeder, which is the basis for what other altcoins use.
Are our IPs already subject to being blacklisted, and the only difference is that it's done on the network instead of in our local client?
Sure, I guess every server has some kind of protection against DDOS. The whole controversy because it is directly in your Bitcoin client is silly.
I am pretty sure, I would find someone on the Deep Web I could pay to DDos some servers, if I wanted. DDosing servers is nothing unusual. It happens all the time. So, servers need protection against that, which often means to block malicious IPs.
