I have not played Hardline a lot, and I don't need see a reason to stay away from any features as long as you don't come a killing machine with to high K/D and to much score per minute.
Doing that will alert Fair Fight.
So every feature you want to use will be safe as long as you use them wisely.
If you decide to join our community I know that Hax0r have posted legit settings that he uses for our Hardline cheat.
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