A user suggested an [edit](https://meta.stackexchange.com/review/suggested-edits/34393) to [my answer](https://meta.stackexchange.com/a/246040/202832) on [this question](https://meta.stackexchange.com/q/246036/202832) of theirs.

They removed relevant, useful information from my answer because (presumably) it incriminates them of spamming. Fortunately, because they didn't have [the privilege](https://meta.stackexchange.com/help/privileges/edit), the edit was rejected by two established users.

Is this behavior acceptable?

If not... What, if anything, could be done to help discourage malicious edits such as these?