I recently observed that PYPA team activated a lock-bot on issue which is aggresively locking tickets, preventing any further commenting on them.
While I do understand why other projects used bots to help cleaning their issue tracking of very old tickets (usually using a two step process pre-closing warning and a final close in case of no reply), I do really struggle to understand the reason for locking which has clear purpose preventing communication.
I was watching lots of tickets and getting the notification about having them locked is very frustrating as it also closes the communication channel. There is no way to reply to it and to involve the others.
There are very few projects where I seen this used and with almost no exception it was controversial and related to political moves towards less-openness. Such example was Travis which started to close their tickets, locking them and asking people to use their own ticketing system (not public).