I had an answer to a moderately controversial question that was just deleted by Community as spam/offensive. The answer was highly-voted (last I checked, +14/-7) and appreciated by OP as indicated in a comment. The content was not offensive or disingenuous in any way, but was the sort of thing that MRA troll types don't like to hear, and the deletion, along with a string of downvotes, happened right after a hostile user created a new account on the site just to argue in the comments. It seems likely all the deletion votes were from people associated with this user.
Aside from flagging for moderator attention, is there anything that I should do? Are there mechanisms that should be put in place to prevent this?
Link to the answer here for users who can see deleted answers: https://english.stackexchange.com/a/457848/10593
And text copied here (first line answering the question):
While there are words that carry the meaning of sitting in a way that takes up too much space, an essential part of the meaning of manspreading is the connection to a culture of male entitlement and the power dynamics of gender and personal space. If this is the meaning you intended to convey, you should keep it. It is not "misandry", and claims of "misandry" should be treated as highly suspect of being misogynist in nature (denying the reality of gendered power dynamics). There are cases where the word "misandry" is a meaningful criticism (e.g. denying that a man could be the victim of sexual assault or claims that men are not suitable as single parents) but this is not one of them.