Character limits?

[stuartpb]

I'm thinking 2^20 characters max per message. That's 1MiB of ASCII and ~4 MiB of extended Unicode characters (depending on internal encoding). This will likely be fine.

[stuartpb]

Maybe keep a running "user corpus" of total posted characters (via sidecar on insertion queries), and flag/ban users who go insanely high (possibly relative to account age), and maybe some other red flags around inhuman activity spikes. (Also maybe flag/ban users who send >8 messages a second.)

[stuartpb]

Because yes, maybe now and then somebody needs to post all of Finnegan's Wake in chat.

[stuartpb]

Rejecting based on inhuman activity volume seems like a good use of HTTP 420 Enhance Your Calm.

[huttj]

Hm...that seems like a lot.