I'd argue that there's different types of spoilers.
Spoiling things based on Willis's statements on Tumblr, in the DoA comments, or in Walkyverse comics is perfectly fine (in a spoiler tag I guess), IMO.
Patreon spoilers, however, are a huge dick move IMO, as they devalue Patreon for those that do pay for it to get early access. (I'm not personally a contributor to Patreon, partially because the early access is basically a one-time reward (one day ahead), and then stopping means you basically get a one-day penalty.)