Answer me this...its about hacking

me and my clan were recently in a clan war today and we ended up playing inf_gaming who is ranked about 11 out of all clans on CF... we played eagle eye and first round stuck together went to a site came around the corner met 3 of them and our whole team died within 3 seconds all by headshots..but this wasnt the only time... every single round every single kill... all of us died instantly and by headshot... if we saw there characters...we were dead...always by headshot... now unless these guys are sitting at there computers with bedpans playing crossfire and sleeping and thats it then i dont see how its possible to do this...