When I was a PhD student there was a problem with people standing on toilet bowls, shitting over the floor, in the bin, in bags and so on. To the point where signs had to be put up telling people to sit on the seat and a long e-mail sent round by a top professor saying ‘if you keep doing this we’ll use the swipe access to work out who you are’.
This in a building supposedly of bright academics
It is definitely a cultural thing - particularly among Southeast Asians who also use squat toilets. I've had to manage this issue quite a lot in the workplaces i cover, with some very clever people but with no barometer to check their social skills, to the extent of putting up pictorial signs.
When i was a train in Vietnam a few years back, there is a squat toilet at one end of each carriage and a Western toilet at the other.
Waited for a little old local geezer to emerge from the Western bog to find his shoeprints on the seat on which he had clearly been squatting!!
The other issue i had at work was with people from Greece and all sorts of other countries putting their used bogroll in the sanitary waste bin as they don't put loo roll down the lav at home. Many complaints of the stench in the hot weather and the hygiene waste company wondering why they now had to empty the bin twice a week instead of every couple of months.
Cultural norms are difficult to change, it seems!
But shiiting on the floor in a pub toilet? That's just skanky - probably pikeys