I did not have time to think about what might be a reasonable block time, so I set it to infinite, but with the idea to reconsider later (what you already did). My aim was to remove the inappropriate contents (also a dozen obscene messages on your and my message walls) as quickly as possible.
I see that you tried adding VSTF logic, but I think there is an extra 'MediaWiki:' in the added code. (Quote: "Names should not contain the MediaWiki namespace prefix.") Can you verify whether this works as intended?