Travelling for work early today with five other colleagues, fairly new to the job (so I don't know everyone -that- well yet.) The six of us are split between two cars.
Supervisor decides we should stop for a quick McDonald's breakfast (would have preferred drive through personally) To grab a coffee so he could go over some route details with the other driver due to road works we didn't know about.
Anyway.
I purchase my hot chocolate, everyone else gets lattes and tea etc when one of my 'esteemed colleagues' (a man in his fifties) starts waving around the little rip-off sticker collection from his cup and exclaiming
'Stickers! Give me your stickers I want a free coffee!'
Whilst making grabby hand motions like a child!
Basically if you get 6 stickers on your little piece of cardboard you get a free drink, I probably wouldn't have cared too much if he was driving us/had asked nicely but he got quite huffy when I shook my head and told him I had already stuck it on a previous collection and I was actually saving them up myself because I do frequently seem to get hot drinks from McDonalds.
I was quite cheerful about the whole thing and nobody else seemed phased but he literally rolled his eyes and huffed before sulking back to the car! 
Am I being unreasonable to have scuppered his plans a free coffee? He's making a point of ignoring me and has sort of drummed up a bit of an atmosphere!