Kaiba fully supports this endeavor. He takes one look at the offending plants, groans, and immediately reaches for a claw grip. He'll help the girls rip them down.

"More like they thought watching us squirm would be funny," he grumbled, stomping one into the ground and moving along to the next. "Here. If we all work at it they'll be out of our hair soon."

He's actually cooperating with someone! Without having to be told! Hatred of mushy rituals is the one thing that drives him, then.