No, ofcourse not. You can draw anything about anyone in the community. Heck, you can even think of your own characters looks! (Since mine are getting more complicated every comic...)

Hmm... This thread shows a fair progress of my drawing skills... =o Compare comic #1 with the last one I made...

Also, Thunder, you could arrange the comics so that you have a list of story-based comics and a list of random comics. That'd be a bit more logical.