What your describing I have never seen. I have never seen a player become uncomfortable because the opponent is declumping, if they take too long point it out, and they might stumble to hastily finish, but no such action I've seen has the opponent distressed, unless prior tension is built.
TheRolesWePlay: This entire thread started because Ness stated he didn't like it, so for sure it bothered him. Having had it brought to light, it bothers me as well.
There are to problems with this. The first is my continued argument of trying to control the behavior of the player. The other is that you are the minority, and most players are fine with this, and why should the game have to conform to your ideals because you don't like it?
My previous comment was in direct response to your own, where you felt the issue was worth dismissing because you had not encountered anyone who ever had an issue with it. I was making the point that Ness (the topic starter) and myself at least have problems with it, and reading the thread we are not alone.
The majority does not determine right or wrong. Nor am I making an emotional appeal, but rather one founded in logic. The only reason declumping is technically legal is because those in charge decided it was too hard to enforce. That is as opposed to accepting it as something that cannot be enforced but should be illegal anyway to discourage the behavior and prevent cheaters from having a "soft cheat" option.
Actually engaging in the behavior is, at best, a superstitious ritual. Only instead of being a behavior I already find questionable to allow at the beginning of the game, this is one that takes place in the middle of the game and could take place repeatedly. Tell me, would you like it if I kept throwing objects past your head? What if I assured you I was not aiming for you, just near you? What if there was some way for you to know
that was the absolute truth? Would you still like me doing it?
It keeps coming back to the same point: if declumping "works", it is cheating: you have successfully made your deck "less random". If declumping is "properly erased" by thoroughly randomizing the deck afterwards, then it creates other problems. At the very least it is wasteful, though as has been pointed out, this is not the heart of the problem, just a point. If we got something like FireRed/LeafGreen Pidgeot back, which enabled a search of your deck every turn, declumping could easily burn enough time to be clearly significant to the game.
What is the main point is that you're creating a scenario where someone claiming they do not wish to cheat is "going through the motions" of cheating, and a simple mistake or missed step and
they will cheat. As a side effect of this action, you just give actual cheaters another easy venue to cheat.
As for my concerns outweighing others, I'll state it again: it is about what is right and what is wrong. It doesn't matter that I want this: I laid out why it was a poor practice that should be eliminated. The only reason to keep it legal is that it cannot be enforced as a rule, and the only reason player's can give for doing it is "it is my superstitious ritual that makes me feel better".