round here at the bus terminal the new plastic seats in the shelters are dreadful.
the seat is at a incline and not broad enough to sit on. Impossible to sit on them for more than a minute dreadful design and waste of money. thought it was just here but recently up in scarborough they had the same hopeless seats too. who designed them and worse of all why are the bus depots buying such a poorly designed seat.
The design in, most, Fast Food eateries is sloped slightly forward of normal. McDonalds, Burger King, Pizza Express, etc
The seats are designed to be comfortable, that gives you a welcoming impression, but the slight forward slope means that you need to be slipping yourself back onto the every few minutes. Thus subliminally persuading you not to linger too long.
As BT says these Shelter seats are not designed for sitting comfortably. just to take the weight off your feet.
You're right it helps keep the shelter clear for its primary purpose.
I remember seeing something on TV years ago that suggested that the 'Victims' chair in the Bosses office should have an inch or so removed from the lega so that it was lower than the Bosses chair, and that the front should be half an inch lower than the back to create the 'uncomfortable' feeling.
Here,we have nothing more exotic than a metal beam to recline on.It is so close the the wall of the shelter that you can only lean against it,not sit.If the seating protruded any distance though,the shelters intown would obstruct the pavement.