I agree with Quik. We cannot say this is an outright call to downvote brigading, and people are totally allowed to talk about how they don't like an article. However, I will suggest that CFOperator may be spoken to in order to suggest that this is shitty behavior in general, and goes against the spirit of the SCP Foundation's collaborative fiction project.
While we cannot tell CFOperator that they can't say elsewhere that they dislike certain articles, attempting to draw attention to articles they personally dislike with such strong claims shows that this user is not interested in approaching participation the way fiction workshops generally go. This is not something that can be pursued, however, and I recommend other staff don't bias their decisions based on this lack of collaborative attitude. We do not screen for lack of 'play-nice' personality.
My suggestion is therefore to talk to CFOperator that the above is dangerously close to an explicit downvote brigade, and while he is free to discuss articles he dislikes wherever he pleases, telling people they "need" to see this bad article is fairly close to inciting a brigade. It may be prudent to also remind CFOperator that the SCP Foundation and the RPC Authority (which CFOperator runs) have agreed on mutually enforcing anti-brigading policies.
EDIT: As a result of CFOperator continuing to post about specific users and repeatedly linking to articles and encouraging people to view how bad they are, I am under the impression CFOperator may be, in fact, fully aware and intending to harass specific staff, users, and bring negative attention to articles that are considered "too political" for CFOperator's personal tastes.