This may be an age/location thing. Mike Dean was a very well known Premier League referee. Sorry if you're not from the UK or under the age of 25, I'm not having a go, I thought it was an obvious gag.
I like a day bag, not gonna lie. I have an ancient cheap canvas messenger bag that is just enough for 3 or 4 cold cans, baccie, weed, rizla and lighters, tissues, antibac and suncream. It goes in front of me when I walk or in a crowd, makes for lumbar support or a pillow when parked on the floor and a nice little table to skin up on in comfort at gigs. It celebrated it's 30th birthday this year, after buying it for a fiver at Phoenix in 94.
I've experienced the dude oblivious to the fact he's repeatedly bumping into you, on one occasion every time I moved this dude and his mate seemed to appear again 2 minutes later right in front of me to repeat the experience, I swear I'd have considered it with malice aforethought if it hadn't been for the fact that he and his mate spent the entire time ignoring the act and at shouting volume discussing the wealth and property values of the parents of apparently everyone they knew.