If you have seniority over them, then do a code review and fail them for not adhering to the coding standard. If it continues you can give them a formal warning. If it then continues you can fire them and get people in that can spend 20 minutes reading a coding standards document once in their lives.
I don't know what IDE you use, but Eclipse lets you set up code formatters that you can distribute around your developers, so this might also be an idea.
However there may be an underlying problem - that the other developers dislike your coding standard. It might be best to first find out if this is the case. If your coding standard is actually not a common standard in your language then they might just be passive aggressive as long as they can get away with it. Maybe you should involve them in the development of a coding standard that they are all happy with, mostly.
