Yep, CYA is the name of the game. I use DC on everything. I traded 3 2012 Americana base cards for 5 other base cards to finish my set, and I DC'd that package. Partly because it's habit, and partly because I like watching the tracking on the packages, to see if anything weird happens, say shipping from NC to NY, and the package went through California.
My Sketch Card Collection: http://www.sketchcollectors.com/gallery.php?user_id=39
I am an IT specialist. If you see me laughing, pray you have a recent backup.