Ugh, I hate them so much. When I was at secondary school (all girls), practically every year 10 student used to think they were hipster/whatever by wearing them.
I cringe when I see girls or young women wearing them in the street! I do have to say there are some pretty ones though that do not look like those vile black plastic chokers.
Personally, I like chokers they show off the collarbone and neck nicely and I wear them myself from time to time. I think the more important question is do you like wearing them or think that they look nice? No need to look for the approval of others or for their permission. It's just jewellery so wear what you want to wear and embrace it
It's not something you can get away with wearing strolling down the street.
Looks more like something your partner might ask you to wear as part of exploring fetishes... And something that'd end there and not enter your everyday wardrobe.
Personally I'm not too keen on the wiry ones although I have been known to wear them if it suits my outfit, but I am quite a big fan of the thicker velvet ones, like the one Mathilda wears in Léon the Professional :-)