Of course not. Just "accidentally" swear at the referee long enough to pick up a yellow. I recall something similar in a world cup group match. The team won the first match, and was winning the second, which already guaranteed progression to the knockout stage. Their star player was on one yellow from the first match (I think it may have been Stoichkov for Bulgaria), and so spent the last fifteen minutes swearing and arguing with the referee. He finally got his second yellow, and left at the end smirking, knowing that his suspension was for a dead rubber.
Back to Pelle. If he does it, I think it's a great idea, and poetic justice for the ridiculous rule that cautions in cup matches are mixed with those from the league.