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The user-agents are typically bogus listed as " Mozilla/5.0". I do not see a solution other than leave it alone or block them.
I suppose the next step if I do not want to go that route is to create a php program to temporarily block after so many queries. Unless there is an apache setting to do that but I have not found it yet.
I am not sure what kind of performance hit I would take if there is alot of addreses I would be rewriting.
I know I kind of answered my own question but if anyone has a better solution I would still like to hear it.