Comment Probably NAT or proxy related (Score 1) 131
This is most likely proxy-related.
Google human-detection / anti-SPAM efforts are IP based and unless you're authenticated against google there's a very high chance you entire institution is being seen as a single entity. This is usually related to campus level NATing.
There is a variant which is the result of a well-intentioned librarian putting google scholar behind EZproxy ( https://www.oclc.org/support/s... ).