That's something you have to account for when playing. Pings happen because of bad internet. See, if this was implemented, if someone was about to lose a duel, they'd fping (meaning they'd force themselves to ping by doing stupid shit), and they'd get their TC back. This would be abused, but wish it could be implemented, but won't.
can you make Ping frames so if anyone pinged at the first space or move the duel canceled ;-;