It is easy to enable comments on your wiki page by using the module provided by wikidot, which you can add anywhere on your page by copying and pasting the following code:
Your page will now look like this:
In the above example, all the posted comments will be visible viewers. If you wish to hide the comments, alter the code to read as follows:
[[module Comments hide="true"]]
The comments can then be revealed as desired by clicking on the link "show comments," and subsequently hidden again by clicking the link "hide all comments."