The first couple of times, I'd edit them and notify the author. If the problem persisted, I'd consider the author anti social and downvote (some) new nodes and request reaping of any that overly disrupted otherwise useful threads. If the author managed to make enough of a nuisance of him/herself, then the author would probably eventually find that s/he had "fogotten" his/her password.

I would not continue to edit (at least the majority of) them!

Are all-code posts that big of a problem? I think it ranks more closely to that of individual monks who persistantly post incorrect answers, use poor grammar, don't break their text into paragraphs, use <a href="http://www.perlmonks.nog/..."> instead of [...], etc. Sure these are all annoying, but I don't think any of them fall into the category of "let the editors fix them forever". (Yes, I know and accept that I will be fixing these types of problems "forever", but I refuse to keep fixing them for the same person over and over again and, if the person refuses to modify their behavior, then I think other editors should likewise not use their special powers futher.)

        - tye (but my friends call me "Tye")