It would still be unsportsmanlike conduct.
The green dot on his helmet indicates that he is wearing a helmet with speakers in it so the coach can comunicate with him on the field. The reason for the dot is so the refs can see who is wearing this type of helmet as it is a penalty to have more than one player on the field at a time wearing this type of helmet. If you notice, all quarterbacks in the NFL have a green dot on the back of their helmets.
The collective noun is a field of runners.
This is known as the Emmitt Smith rule. He was fond of taking his helmet off after scoring a touchdown to rile up (or taunt) the crowd...and perhaps for better photo opportunities. The league considered this to be too much showmanship and created a rule that no player is allowed to remove his helmet on the field during the game (except during timeouts and between quarters). There is no penalty if a helmet comes off accidentally.
It is not legal anywhere on the field. So, it applys all over.
Typically helmet bags are used to store field dressings. American paratroopers tended to tape their field dressings at the front of their helmet for quick access if they were wounded. It could also be used to store the main unit and batteries for a helmet radio.
Yes but that would be a penalty to have to many players on the field, if they are on the other team then they will get the penalty.
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If a player fouls an opposing team player in their 'own penalty box' a penalty is awarded
" 5 RUNS " are awarded to the batting team in cricket if the ball hits a helmet lying on the field.
THERE IS NO PENALTY
The penalty spot is 12 yards from the goal line.