Why no specific names of false apostles and false brothers in Acts and epistles? Why is it so that while we are told in the Acts and epistles of many false-apostles and false brothers, there are no specific names mentioned? Has this matter ever been considered in Christianity?
Here are some suggestions, none of which I am claiming as necessarily the answer:


Naming people draws attention to them. The writers probably didn't want their readers going to find out what these people were writing
Naming people makes them exclusive. If the writer says "don't listen to Marcus and Suetonius" that leaves Octavius free to spread his teaching. This is especially true since the letters were circulated widely, and the authors may well have understood that they were also writing for a later generation.