A "best practice" for using tape
Step 1: Pull out a length of tape. A 2" to 2.5" piece works well for me (diagram arrows denote sticky side)
Step 2: Fold about 1/2" of the tape back onto itself to create a pull-tab
Step 3: Place tape, with the pull-tab towards the open end of the bag, over the flap and the body of the bag.
Step 4: To open bag, pull the tape away from the flap using the pull-tab, but leave the tape attached to body of the bag. Lift the flap and place the tape back down against the body of bag. Now with the flap free of tape you can safely remove the comic. When done, insert the comic back into bag, pull the tape back, fold flap down and reattach tape to flap.