If you read the discussion, you'll notice that they mention that it's in the Japanese version. This is confirmed by the date of the discussion, which was 2009, before the release of the English versions of the game in 2010. These glitches should not exist in the localised versions of the games, as they patch glitches found in the Japanese games before they release the games in other areas. So you have nothing to worry about, assuming that the bugs were patched during the localisation.
I'm still not convinced that they did exist though; remember, you found them on a gaming forum. They can post anything there and make people believe it. I know some of the other glitches they mentioned are real, like the Slowpoke Well boulder glitch, but Bulbapedia says nothing about most of them, including the two you're wondering about.
Some of these may be bugs exclusive to particular emulator/ ROM hack versions of the game, they may not exist in the actual games.
tl;dr: we don't know for sure, sorry.