I hooked into a bruiser this morning. My shouts of "Spring on" went unnoticed and my line was cast over multiple times. We even anchored up and lost our spot to some prick in a 14 foot green Legand. Thanks buddy. Real classy. Maybe I should buy a buoy and leave a few scattered at some of my favorite spots and bounce around all day and be That Guy.
It depends on the what the dude in the 14 foot green Legend was aware of...
If he wasn't aware you left the spot to fight the spring, and he jumped into what he thought was open spot = not a d!ck move
If he was aware you left the spot to fight the spring and jumped into the spot thinking you might not come back, and if you did come back he would give the spot back to you = not a d!ck move.
If he was aware you left the spot to fight the spring and jumped into your spot with no intention of giving it up if you came back = d!ck move.
And Milo has a good point, dropping a buoy makes things a whole lot cleaner.