Shaykh the ‘Allaamah Muhammad ibn Haadee al-Madkhalee (May Allaah preserve him) said:
“If there occurs misunderstanding between two brothers and turns (into an affair) that one writes about the other while both of them are upon the same path, upon the same methodology and (with) scholars who are united; this way is not good. And if you have observations against him; this is your brother, so convey it to him. As for you revealing those matters on the Internet, sending them and writing them, then this is spreading the deficiencies/shortcomings (of others) which is not permissible.
As for knowledge, then this is another matter. As for refuting the mistakes that one has deviated in is (also) another matter. And even the mistakes; there are some which are private and some which are general (information). If they are private then it is not befitting/correct to spread them in a general manner (openly). As for what has been circulated and spread among the people then the refutation should be publicly and spread (similarly) regarding that matter so that which correct is spread among the people until they are aware and they correct the error. But what I intended by this speech is, if there is something between you and your brother, then do not be hasty in spreading it on these websites because this is in opposition to giving advice and this is in opposition to the manners you should have between yourself and your brother. And with this method you leave the door wide open to spread evil between you and your brothers. Therefore oh my beloved ones, brothers and sons, I hope you have understood this and that you transmit this to your brothers who come after you. This is something which can be heard (listened to) and inshaAllaah it reaches everyone. This matter is an affair in which many of the relationships are corrupted between brothers (do to this). And all of these are personal issues and we ask Allaah for well being and safety.