Is invisibility a problem in halo 4?

Hi my name is jack and i love playing halo 4 but recently me and my friends have been having problems with people being fully clocked but running at us. i am not trying to start any fire wars i just want to see other people opinions on the matter and see if any one has any anti camo tips.

thank you for reading and have a nice day killing some Spartans :smiley: