How do some hadith scholars criticize certain narrators for having a long beard as a form of dispraise?

The questioner : Here, I have a question regarding the use by hadith scholars of the description that a certain narrator had a long beard as a form of dispraise. It is troubling to me. How do the hadith scholars use this? It opens the door for those who insist on letting the beard grow, and I do not mean by letting it grow that it should be lengthened.

The Shaykh : Do not say that letting the beard grow means lengthening it.

The questioner : And I do not mean by letting it grow that it should be lengthened.

The Shaykh : Do not say that letting the beard grow means lengthening it, because the dispraise was directed at the hadith.

The questioner : Shaykh, is it possible that this strengthens the school of thought that says what is above a fistful?

The Shaykh : Then you should say that this usage, or this statement, is a dispraise of one who opposes letting the beard grow.

The questioner : One who opposes it by lengthening it. Is it possible to use this practice of the hadith scholars to strengthen the school of thought that follows the position of Ibn 'Umar (may Allah be pleased with him and his father)?