:I appreciate the followup.  I reviewed the user's editing and block histories and still conclude that a one year block is appropriate: 
 :* The block is for anons only.  Registered users can still edit at that IP address. 
 :* The previous block was for 600 days, an unwieldy interval which is about two years minus four months.  Usually anons are blocked for one year maximum.  Subsequent blocks are traditionally one year except in extreme cases. 
 :* It was blocked nine times before. 
 :* Though the edits are mild, they began in January as significantly bad-faith edits. 
 :* The January edits were within hours to days of previous block expiration, and commenced the very same quality of unneeded edits. 
 :* This is a large school which has a consistent quality of vandalism spanning many years.  Most likely, the culture of the school lives on. 
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