Juliana L Holm wrote:

One of my favorites is the backpackers note not to wear jeans in europe sinde
you will be identified as an American. On my last few trips to europe it
seemed everyone was wearing jeans!

I've certainly seen "designer" jeans on plenty of young
people in Paris and Vienna and Brussels! (Jusging from the
variety of languages I overheard them speaking, they were
definitely NOT Americans.)