I’m not the one to judge, having been doing twitter seriously for just a year, but anyone with powers of observation can see certain patterns in the chaos. If it seems that the list leans towards those either writing, editing, agenting or publishing books, that’s because of MacNaughton’s Laws 1 & 2:
1. Every damn fool thinks he or she can write a book.
2. Every damn fool is on the Internet.
And yes, both the above apply to myself; I appreciate the irony. Note the order below is not arbitrary.