Well it already is included as an option in the eAthena Battle Config file - it's just turned off by default. I would personally find it quite annoying to see every time I steal an immortal heart from a verit while on my Rogue. I'd prefer it stay off. If you want to SS stealing a card from an enemy for personal pride, go ahead - it shouldn't matter if people believe you or not if it's for your own sake.
