Well, preventing further spoiling, of course.
For what it’s worth, the spoilings on Discord are always accidents, with Worm coming up in places I didn’t expect or conversations that tangentially involve Worm leading into spoilers by people who didn’t know better. Worm isn’t a usual topic on the servers I frequent (though admittedly it’s become slightly more common), so I usually feel rather safe there, and the two servers I frequent the most also happen to have #worm_spoilers channels specifically for my protection.
Also, this is one of the reasons I don’t have a server of my own. As a moderator of several liveblogger servers, I know well how easy it is to spoil something by accident in casual conversation, and having a server of my own would be inviting loads of casual conversation about Worm that I would be reading. Another reason is that I have a policy of keeping everything on the blog, due to seeing how archival readers miss out on some things from livebloggers with Discord servers. This is also why I post screenshots of almost all relevant Worm talk I do on Discord.
As a liveblogger, I must do my best to avoid spoilers, but occasionally coming across them is kind of to be expected. In a sense, I’m lucky to be liveblogging a work with a smaller fandom (compared to Homestuck, SU and the like), as it reduces the number of places where I have to always be on the lookout.