So I did it
I pruned about 15% off my list, mainly people who haven't posted since 2009 or earlier. If you can't see any other posts today from me then I probably pruned you by accident please let me know and I'll graft you back on. I mat have made some mistakes as I went through all 6 pages and then clicked save, it only saved the 6th page so I gad to go back again, I must admit I was a little less careful that time.