> Because people aren't clairvoyant
Luckily they have a generic message to read. No clairvoyancey required.
I'm not defending signal here because i just like signal. Almost any other open source project would have responded the same way. Many would probably have been less polite about it. If you send a personalized note to everyone who reports a bug incorretly, you won't have any time to actually fix bugs.
Edit: i agree though that the false positive spam ban is a bit unfortunate. Shit happens sometimes. I maintain the generic message was totally reasonable and they should not do anything different in that regard if they could do it over again. The spam ban however was understandable but obviously should not have happened.