There is no such thing as a "bannable action" at Wikipedia. Rather, there are actions which we as a community strongly wish to discourage.
It's not a matter of "he stole an apple from a street vendor, cut off his hand". There is no hard and fast rule like that.
Each person is different. Some people will respond to reason, or flattery, or humor. Others require what the Cunctator might term "hard" measures like warnings, suspensions, or expulsion.
I don't want us to get into a mode where we say, "He did this, so he should be banned." Rather, let us say, "He did this, let's find a way to make him stop it."
I've already warned Annek, so if he keeps breaking the rules I guess this will make him a good candidate for the Arbitration Committee's first case. Or if that's not quick enough, someone can ask Jimbo to examine his edit history.
Ed Poor, aka Uncle Ed