I've had loads of people at work, mocking the accent or phrases etc and going on about cobbled street, coal mines, outside toilets etc.
I guess nowadays I could probably take it to HR and make a big deal of it, but never felt the need to, I'm a big boy and can recognize the difference between people having a laugh with me and bullying/discrimination.
Similarly I have had loads of comments. All friendly but I get called 'Northern' quite regularly within a sports club I play and in work have had the whippet comment and where's your flat cap among other things. However, the tone of the comments in the article is somewhat different perhaps to the friendly manner in which these exchanges took place.