Yes, the insulator collecting hobby exsists. In Europe are about 60 collectors, in USA and Canada about 6000 ones, Australia about 20 ones, and every point of the world. Some people collect them, because they like them, I collect them, because I am interested in them and I am power electric engineer. I had studies about plan power lines.
Linemen page, very imaginative :-)
But someone are in Helsinki, he has 10-15 pieces collection, he is member of the internet club:
Interesting picture album for linemen from insulator collectors (mostly Americans..)
If you wish, I can upload photos to here too. In Europe every countries have different constructions, I love it :-) America is monotone.
Thanks again colleagues, Fluxus