In America, Star Trek is mainstream enough now (thanks to JJ Abrams) that it's not really a stigma. More just some big, boring mass culture thing, like The Hunger Games that the common herd likes for a while, and then moves on to something else, and then back to it when it gets shoved in their faces again.
If you want to be cool, you have to be a Browncoat.
I've never noticed any difference in between a fan of a TV show vs sports fan. People talked a lot about Lost without anyone thinking it was particularly nerdy or dumb. Being a fan of Mad Men or Game of Thrones seems at least vaguely cool, certainly not stigmitized. Ditto for The Walking Dead, although the "in" thing there seems to be to slam it (which I don't really get, I think it's a great show).
How is liking a top-ten blockbuster "cool"? It's not unique enough to be cool (or to be stigmatized - it's just there.)Oh, you're also fine if ST 2009 is the only trek you like. Then you're considered cool, Macchio even.
If you want to be cool, you have to be a Browncoat.

I've never noticed any difference in between a fan of a TV show vs sports fan. People talked a lot about Lost without anyone thinking it was particularly nerdy or dumb. Being a fan of Mad Men or Game of Thrones seems at least vaguely cool, certainly not stigmitized. Ditto for The Walking Dead, although the "in" thing there seems to be to slam it (which I don't really get, I think it's a great show).