Ok,

I don't know if this has been discussed before and it doesn't apply for the rtk website.
But since recently I am using anki for reviewing the kanji and I thought about another way of handling the troublesome, similar (or same) in meaning, kanji.

Would it be any hurt to my learning process to join two flashcards with almost similar kanji? So for example, I would combine hear 聞 and listen 聴.
The question flashcard would be: "hear/listen [2]". As an answer both kanji are expected.

Of course you would have to carefully select the kanji that you don't miss important differences, but for this example, as far as I know, even some Japanese people don't know the difference without think about it. Why should I torture myself by trying to distinguish them?

I would love to hear your comments about that. If there are no major drawbacks I'll probably go with this.