That's interesting situation... not sure what LFS can do about it, if somebody is hosting LFS server on the same IP where some phishing server is also running (or maybe they run both operations on the same server).
(also it's IPv4, i.e. who knows how many machines are mapped to it, listening on different ports, maybe the phishing server is not even the same machine as the LFS server).
"Does this worry LFS racers without protection against phishing?"
No, not me. But I don't use antivirus and I don't use MS Windows and the chance of getting my machine successfully attacked through LFS is low enough to simply ignore it. Also I treat all games as low-quality code in terms of security, game devs usually don't have time to properly harden their code, also I guess they don't pay for pen-testing on regular basis, and life-span of game is usually way too short to catch and fix most of the bugs, i.e. expecting a game client to be not vulnerable sounds to me as really crazy idea. So I run games in away that any successful exploit will be probably contained in reasonable space of my system, not accessing/damaging anything important.
But if you are paranoid enough, maybe you shouldn't run any MP game...