Ah, dub edits...the level of retardation here sometimes reaches astronomical levels.
As Stel mentioned, the "invisible guns" - a key feature in Yu-Gi-Oh's Duelist Kingdom. It is what it is essentially - a gun that has been edited out whilst the person's hand still appears to be holding it, hence "invisible gun." It's lazy and pointless to me, because it not only looks dumb, but other non-anime cartoons have had the balls to show guns; characters like Elmer Fudd and Yosemite Sam almost always carried guns and used them (a bit too often in Sam's case,) and Bambi was shot by a hunter in his film.
My favourite dub edit by far was the addition of the "Shadow Realm" in the Yu-Gi-Oh! dub. Essentially, it was designed to circumvent the fact that throughout the Battle City arc, Marik was trying to kill Yugi in the original, so for the dub they decided to make death = getting banished to the Shadow Realm...which resulted in some of the most ridiculous things ever to appear in Yu-Gi-Oh! Circular saws designed to cut the losing duelists legs off and make them bleed to death were changed into "dark energy discs" that banished you to the Shadow Realm, the tag-duel on the roof of the multi-storey building where the roof would collapse around the loser and drop them to their deaths. For the dub, they'd end up falling into a portal that took them to the Shadow Realm instead. Just to add to the stupidity, Yugi vs mind-controlled Joey would have the loser dragged into the sea by an anchor, causing them to drown, and they didn't bother changing it at all! So, not only were the edits completely non-sensical plot-wise, but they were also proven to be pointless since they didn't bother changing one of Yugi's potentially fatal duels...although I guess having the water send you to the Shadow Realm on contact was a bit too stupid even for them.
Marik's Millennium Rod gets a mention here since in the original, it had a knife inside it which Marik (mostly in the manga as Dark Marik) frequently used to kill or threaten to kill people with. In the dub, the knife was removed and Marik simply banished people to the Shadow Realm instead, but in one scene just after Marik defeats Mai, the knife can clearly be seen in his hand. The sloppiness of the edits does get very tiresome, very quickly sometimes...especially since they proved they already had the technology to make the knife invisible in that particular scene.
One Piece needs no explaination - the quality of this dub is horrendous by any standard, and probably ranks as the most badly dubbed anime in existence today. Two scenes in particular got me - one scene where Luffy was stabbed with a sword in the original saw the sword get edited out...except for the part where the sword passed Luffy's arm, so part of Luffy's arm had the same colouring and texture as the sword did. Another scene showed a character smoking two enormous cigars. The dub edited out the cigars...but they neglected to edit out the smoke coming from them, resulting in two random streams of smoke coming seemingly out of thin air. Stupidity at its finest - the people dubbing this should have been the ones to remove whatever they were smoking from their own mouths.
That said, one anime I've seen actually has a dub which I consider to be better than the original: Shaman King. A miracle indeed - the voice acting in the original sounded bland, whereas the voice acting in the dub added to the feel of the show (mostly thanks to Rio's accent, which is awesome.) This made the dub more interesting to watch for me, since the original sounded somewhat lifeless in comparison - ironic, since the anime heavily features ghosts. Haruhi's dub seemed pretty decent as well - I still prefer the original, but Haruhi's English voice actor managed to nail her outrageous personality very well.
In closing, some dubs are good, a few even end up surpassing the originals, but unfortunately, most end up cheapening the original series and in the worst-case scenarios (Naruto, One Piece) end up completely disgracing it. I don't think the abysmal Naruto dub needs any explaination from me, but...Naruto stopped saying "Believe it!" after around Episode 50 - they knew they'd fucked it up.
