In case you're wondering what these comments were about, they were reactions to Japanese Twitterer Kudo (@jun_kudo_) who came up with a little "trick" to write a complex kanji.

Saito is a very common Japanese family name, but the sai part of the name has as many as 31 different kanji variations.

According to Tokyo Keizai, the most frequent variants are 斎藤 numbering 15,0494 families, followed by 斉藤 numbering 7,3424 families, and 齋藤 at 1,7071 families. Here they are in larger font:

As you can see, things begin to become complex in terms of the number of strokes with the third one.

In fact, there are many variants of the kanji which feature the same top part. Here are a few:

It's this relatively complex top part that is the focus on this little trick.

With the central element looking very much like a capital Y, it's not hard to see how someone could be tricked if it were replaced by the English letters "XYZ," especially when written by hand.

Of course, if you actually need to handwrite this kanji for official purposes, you probably shouldn't try this trick, but it could be fun to test it out on a Japanese friend.