I love to hear where kids are headed and what their next steps are, but I don’t think posting acceptances is necessary. I definitely have shared my kids’ accomplishments along the way and hopefully it hasn’t been too much, but I know my family and friends like to see pics and hear good news. For college stuff, I only posted once the decisions had been made.
I do admit that on a very good mail day a few years ago, I took a picture of the three big acceptance envelopes that arrived that day for my kid: Brown, Vanderbilt and Emory. I only sent the pic to my sister though.