If I may add my 5cents, I am undecided about the alien crosshairs on the HUD. It appears to me that it is an advantage but it can be achieved in a hardware style, however cumbersome that may be.
I think a greater issue is where there is REAL advantages gained eg, the addition of a radar either more advanced or at an earlier stage than is normal. To me THIS is a REAL cheat.
Currently I am a GameOp on the GameArena servers and if i kick or ban someone there is a burden of proof put on me to ensure that people are cheating or behaving in a way against the Code Of Conduct. If someone is cheating by being able to predict the exact location of the enemy when they are not suppose to know IS cheating. Having the computer do the aiming and firing for you IS cheating. Knowing where to aim using the mouse, well that's practice and skill, and having a dot on the screen in my oppinion is an aide. Saying this though it seems that it wasn't intended for aliens in Trem 1.1 so maybe that is additional information that shouldn't be added into the HUD.
As a GameOp at the present it is impossible to tell if someone is using a HUD with crosshairs since it's a client side modification. Even if someone says that they have them isn't proof that they have crosshairs, only that they claim it. Can you kick/ban them for it... maybe but the burden of proof is slim.
I would like to have alien crosshairs, sure, but I won't until the default has them. I would like them because I'm use to them, but I won't change my UI to one that has them as alien because there is a certain amount of discention on whether it is or isn't a cheat. Because of this discension I will CHOOSE not to because 1) I want to set an example and 2) be seen as not cheating by those who think it is and therefore be above reproach.
Will I change my HUD? Maybe, if there are HUDs that show no more than what the default has.
Do I think others should change thier HUD? Well if you're bothered with it or want a change SURE.
It's really up to the people who write new HUD configurations, will you people follow the intent of Trem 1.1 in your HUDs? Will you let people cheat by giving them information that isn't seen in the default UI?