I agree wholeheartedly. The worst is when the conference name or journal title is an abbreviation that is never spelled out!
Please remember that not everyone comes from your area of specialization - but still may have something interesting to say to your conference. I'm often frustrated after taking the time to figure out an abbreviation and then finding out that it's something completely unrelated to anything I do. But I don't feel like I can ignore anything with an abbreviation I'm not familiar with, because there's still a chance it could be relevant.
If you're forwarding a call that has an abbreviation at the beginning, I would appreciate if you could spell out the words for those who may not be familiar with them.
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-Angus B. Grieve-Smith