Today I noticed while the behavior is still a nogo on Google Chrome Desktop browser, and Mobile Safari:

Request-URI Too Large The requested URL's length exceeds the capacity limit for this server.

Microsoft Edge works fine for same blog post (truncates length) when sharing

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Does anyone know if {$post_body} can have addition edit to only include first ### of characters?

Here you go: http://www.ewtnet.com/limit-number-of-text-of-each-post-in/

Sal - Thanks! That worked great for shortening the blog description on the Blog List page. That will really help when several Blogs have been entered. Even with my first test (which was too long) it was a help.

However the issue I am trying to track down is the description that is being referenced in the individual blog when it is shared via AddThis to Facebook.

UPDATE: Looks like the Social Media Sharing plugin (using AddThis) works ok - it is the actual AddThis tools that I have onsite that have the issue.