In your template. Of course.
Good exercice to start reading and rewriting inside of your component.
I could put an option for that, but I prefer to limit this kind of option. The service must not be filled up with paramters everywhere. Cook do instance it, and if you want to remove, do it in the template.
You can also maybe rewrite in JDom, in order to hide it permenently when you are in front.
It is only a concept, but of course you can do it in JDom. (When I think about it, maybe not because you will still get the empty table cell)