In my experience
Pros to self-disclosure (aka "coming out" if you like that phrasing):
* People may be more openly communicative with you
* People may be more forgiving
* People may be less likely to assume that your behaviors are the result of mental illness and may give you the benefit of the doubt, so to speak
* You can discuss Autism and raise awareness
Cons:
* The above rarely actually happens. People will be slightly kinder, but if you're looking for close relationships, people will like you if they do and not like you if they don't...the dx may be less important than you think.
* They may start to infantilize you (if they were not already doing so...)
* Your behaviors may be judged: are you really autistic? How can you have autism?
* They may see you as defective or "other"
* Negative stereotypes
Yada yada... in my experience, ASD self-disclosure has minimal effect. My friends don't care, and neither do my not friends!
I typically only do so for intellectual reasons when discussing Autism issues or if I feel like I need to, to avoid being labeled worse (creepy, mentally ill, rude...etc. Keep in mind though that people may still perceive this about you even if they're aware of the dx, if they're not too familiar with ASD/your version of ASD).
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AQ: 36 (last I checked :p)