Is there such thing as too many references for one paper? I'm currently reviewing a paper that has an uncommonly large number of references compared to the average number for that particular venue (more than 60 versus around 30). This is a regular paper, not a survey one, and although there does not seem to be wrong references, it feels like some are not really necessary, and the fact that one particular author is cited more than 15 times makes me worry that this paper is used to inflate the number of citations of that author (the submission is anonymous). 

Should I mention this in my review, and try to examine which submissions are "abusive", or just let it go?
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