I assume you mean something like pole pockets but on the ends. you can do that but tensioning the banner is kind of difficult and they tend to sag without top support.
if you do a pass through type pocket then you need to grommet the top to tie off the top to the stakes so it won't slide down
or you can stitch the top closed to keep it from sliding down but the pockets tend to tear out easily if not well reinforced with additional layers or if the stakes have sharp edges.
You can also put a pole pocket on the top for support and use pvc pipe with elbows that slide over the stake tops. This can also help hold the stakes apart for better tension.