I tried the same thing, I unblocked one alt and it stayed locked because the other accounts were still blocked. Now I just respond mostly to a single alt unless I feel my response will be seen by others and allow others to see the truth. Sometimes I see people responding that do not realize they are answering a single person using alts, so I will jump in.
Ironically, they accuse us of doing the same things. I have been accused of being a russian, a bot, an alt, posting conflicting information and all sorts of other crap. I am sure you have too. The reality always escapes them, we don't need anything because we post the truth. We don't need their games.