The author of that question is in close proximity (network topology wise) to someone that had been posting spam suggested edits and answers across the network. This is (partly) why we don't automatically purge recent contributions from suspicious origins when they're rejected, there's a small chance that someone might get caught in the metaphorical cross fire.
This is precisely why the review system asks you to pay extra close attention, so that (1) people that aren't don't inadvertently rubber stamp something that statistically is extremely likely to be spam, and that (2) this rare exceptional case can be caught and everything made right again in the universe.
Most times when hosts all over a given network have been spamming multiple sites, everything in that neighborhood is probably junk. This might happen one out of 10,000 times (network aggregate), but it can happen, hence the message.