Reffing O35-2 on the weekend, generally good game but one player was getting grumpier and grumpier. About 10 mins from fulltime, he was interchanged off and headed off to the clubhouse change rooms. About a minute later, the ball went out for a corner, and this bloke started yelling at my AR from just outside the changeroom, about 10m from the corner flag. By this stage, I'd had enough so I ran over and yellow carded him! No-one yells at my AR! Play resumed with the corner kick, but afterwards I thought that technically I was out of order. I presume you can only card a player while they are on the park, in the technical area, or just off the park e.g. taking a throw-in. What do you reckon?
For me, if he was in the vicinity of the field (and I'd call the 10m in the field vicinity), I'd YC as well. Wait for ball to go dead, stop game, caution Muppet and restart as required. I'm with you in relation to my AR's.
He is still a substitute and within the vicinity of the field. You are more than entitled to show him a yellow or red card.
[Many years ago I had an incident where I was forced to enter a change room next to the field just before their game was due to start and ask the players to 'tone down' their repetitive and loud foul language, which could be clearly heard at the canteen next door.
Minutes later I had to do the same again. This time a couple of players then gave me a complete mouthful. GDSFA fully supported my actions, and they both got red cards and very long suspensions.]