A lot of Scots are Exorcists.
"A lot"?. Where's your evidence for that? I've only ever come across one Scots professional exorcist. It's not my religion, anyway...
Wherever they go the spirits disappear.
Among the more sophisticated of us, they tend to disappear very slowly, with much enjoyment to be had during the long, slow disappearing process...
I once knew a Scot that married a girl who was born on 29th February, so he only had to bur her a present every 4 years.
I never knew that you were a compatriot of mine, Thal!
To be serious for a moment, however, Scottish meanness is just one of those national jokes that long ago wore as thin as the other British ones that claimed that all Irish are stupid, all Welsh can sing and all English believe in fair play. I loath and detest meanness in all its forms. Sorabji (who was obviously not a Scotsman but who, on his rare performance occasions, found Scots audiences to be at least as intelligent and receptive as any anywhere) used to say that he, too, deprecated meanness of all kinds wherever and wherever he encountered it, but that meanness in musical creation was the worst instance of all. I can't and wouldn't dream of arguing with that; why give the audience what some of them might have been told that they want, when you can instead make more effort and give them far more than they might have expected?
Best,
Alistair