This is completely unacceptable behavior, and I've gone ahead and suspended this user for a few days as a result.
While we have some system-level safeguards in place for people who repeatedly make bad suggested edits, this goes far beyond that, so please do flag us and provide a link to the bad suggestion. I almost always regard these as helpful, because we might be able to spot larger problems as a result (like this creative bit of sock puppetry from earlier todaythis creative bit of sock puppetry from earlier today).
Automated safeguards like the suggestion ban are more for people trying to submit minor edits or who just aren't understanding the edit process. Outright vandalism is malicious behavior, and moderators really should be made aware of it so that we can act. A link to the review in an "other" flag should be enough for us to work from.