Users who don't want the bot replying anymore can send it a
message with the title "blacklist". The bot won't reply to any user
who has done so. Note: There may be a delay between sending the
message and the bot blacklisting the user
No context posts that are NSFW will make the bot's post NSFW. If
the parent comment or the original post are NSFW, the "What's the
context?" link will say "What's the context? [NSFW]"