Oh yes. Also, one or all of the following:
1) Wearing a thick winter coat on a very warm day in the middle of summer
2) Continuing to wear a rather large face mask despite COVID restrictions/high numbers being long past
3) Having an enormous rucksack yet resolutely refusing to stick it in the luggage rack
4) Clutching a rather tattered notebook with lots of colour-coded train numbers scrawled on it in appalling handwriting
5) Talking to total strangers (if in the south)/not talking to total strangers (in the north)
6) Reading a rather intellectual-looking book
7) Standing by the door waiting to get off several minutes before your train is even approaching the station you wish to get off at
generally marks you out as the sort of oddball that no one wants to sit (or stand) next to, definitely from personal experience anyway!