Posting to see if anyone has come across this issue.
While doing some cleanup activities on my site, I accidentally came across a review for one of my products that was for a product not sold by my company. I proceeded to navigate in my Admin panel to Catalog > Reviews and Ratings > Customer Reviews > Pending Reviews. There I found over 200 pending reviews that are for various products not sold by my company.
It looks like there are some similar words in my Product Name that these reviews are keying off and/or capturing. I don't know how this could be happening.