Well the tyrants killed or exiled everyone they thought were disloyal to them, and they let Socrates stay. This along with him being Critias teacher meant that

Well the tyrants killed or exiled everyone they thought were disloyal to them, and they let Socrates stay. This along with him being Critias teacher meant that the Tyrants at least considered Socrates to be on their side, even if Socrates didn't see it the same way. As far as disobeying the Tyrants Socrates said that he was ordered, along with three others, to bring another citizen to the tyrants where he would have been killed. Socrates said he disobeyed and just went home, refusing to help or to warn the man. I'm not aware of anyone who did corroborate this, and even best case scenario it's still a pretty weak form of disobedience which wouldn't have won him many friends among the families and friends of those executed.