No server list.

4D1: you don't need to buy the game here, even if you need to have an original version of MW3 (Downloadable), then you make an account on their website and you can play with actual MW3 steam stuffs (By stuff, I actually mean that the Steam version MAPs are used here).
About hackers here, some wallhackers here, few aimbots there, because they aren't released, so made by people using it themselves, but apparently, nothing is easier to unban yourself on 4D1, either you are account banned, then you wait 5 days or make another account, or you're server banned, but you can use released stuff to unban yourself.

TeknoMW3 finally, blocked at 1.4.3XX version, so you can only play in the original maps of the game, not others like terminal etc (But they are releasing a new launcher/DLCs to allow people to play on these maps.), about hackers, a looooooooooooooooooo[...]oooooooooot of hackers here, there are aimbots, people who can crash your game, crash the servers, WH, people take over the control of server by stealing admin's ID.
But, on Tekno, when a hacker is banned, he is banned in a "sure" way, there are few and hards way to unban yourself from any TeknoMW3 servers (at least if you can't change your IP).

About 4D1&Tekno : In a way, hacking is "hard", unbanning yourself is easy, in the other hand, hacking is easy, unbanning yourself is hard, almost impossible.