I'm confused by the term "allow". What authority or justification would any club have for banning them - they are a fundamental part of the game.
Yep.Those first Scots stacked those clubs with no bag-right on top of that trolley.
"fundamental part of the game"
That's nearly as provincial of a statement as an American in Myrtle Beach might say about carts.
Though I understand the need for a trolley with that chip on your shoulder.
And for the record I generally use a trolley when available or when culturally appropriate.