This is similar to an incident I experienced at Cedar Rock Park in Burlington, NC a few years ago.
Was playing with my 980 rated buddy from Wisconsin and my lady friend. We had all just teed off of #5 and are starting down the fairs way when we hear "Hey!". We look over to the #2 tee pad (about 500' away) and see 2 sheriff deputies walking our way. We all smile and wave and say "hey" back then continue towards our discs. The deputies (now about 400' away) say "can we talk to you?". I respond with "sure" while hiding the beer I just opened behind my girlfriends back. They ask "have you been to the pro shop?" and I say "I've been in there before but not today. Why do we have to pay to play today?". Now about 200' away they reply "No, never mind. Have a nice day." My curiosity piqued I ask " What's going on?". They were turning to walk away but responded with " A guy dressed just like you dropped a bag of marijuana in there today but he was in his 20's so it can't be you."
Being in my late 40's but feeling like I look young for my age I felt like telling them "Hey man throw me a bone. Can't you at least get a little closer than 200' before deciding I am an old fart?". Of course the open beer made me reconsider drawing any more attention to myself and I just watched them go on their way.
Oddly enough, around hole 8 or 9, I see a guy dressed almost identical to me about 500' away on hole 14 (I think). He was definitely much younger than me. Also several inches taller and 80 pounds heavier, so my hurt feelings at being ruled too old from 200' were somewhat mended.
I considered trying to find the deputies or calling the pro shop but I was having a pretty good round and didn't want to break the flow. So we all just laughed it off and enjoyed the day.