Please. Star Trek is open to anyone. If anyone wants to sit down and watch any of the five series or ten legitimate movies, they are more than welcome to do so. And if they enjoy them, I welcome them to the Trek fandom circles and will be glad to call them friend.
However, if someone shows no interest in Trek until they watch a diluted and castrated version of Trek that has registries starting with zero, single nacelle ships, neglect of iconic characters like April, a hideously redesigned Enterprise and all the other things wrong with this movie, then they are not a Trek fan. I feel sorry for anyone who gets brainwashed into believing this is the pinnacle of entertainment and that it represents what Star Trek is. Star Trek is something wonderful and meaningful. This movie is loud and insulting.
Get it through your thick skull. YOU (nor any of the other "purists") DON'T get to decide who IS and ISN'T a fan. You simply don't. NO ONE gets to decide who IS or ISN'T a fan apart from the individual who chooses to be one (or not) based on whatever criteria that individual deems appropriate. I remember watching the premier of TNG with a bunch of friends back in university. Some of us were TOS fans from way back (myself included--though no one called it TOS then), some HATED TOS and were highly sceptical and some were largely unfamiliar with TOS (knew it existed, never watched it). I thought the new Enterprise looked hideous. I also found the uniforms of questionable aesthetic taste. The "big three" were not there (save 10 seconds with an old McCoy). But I was excited anyway. I came to appreciate TNG rather quickly, even if I always thought the ship looked hideous (it NEVER grew on me--unlike the Abrams Enterprise). Some of the TOS haters loved TNG--still hated TOS, though. Does that make them "illegitimate Trek fans"? (don't bother answering, it's a rhetorical question) Some who were first introduced to Trek via TNG (with the ugly ship and uniforms, as far as I was concerned), went on to explore TOS and, in many cases, came to like it also (perhaps not as well as TNG, but still). Still others of my friends only ever liked DS9. My wife's favourite Trek was Voyager (I still let her live in my house

). Being a Trek fan does not depend on your narrow, fundamentalist definition of fandom (and protest all you like, if you serious think that someone who comes to Trek via the Abrams movie can't be a "true fan", the term applies). And your objections to the validity of the Abrams version are largely ridiculous--bound in irrelevant minutiae like single nacelles and registry numbers (neither of which are "barred" by anything ever presented on screen--I've seen it all more than once, so I defy you to point to onscreen evidence).