No it's not a crime to go off line for a few months for any number of reasons. I can see people being worried about you if you disappeared, but I would think they would be happy to see you back, and be relieved that while you were sick, you are now feeling better, at least well enough to get back online.

And it's NOT your fault if others are not more understanding.

Though we have never communicated before (I'm sort of new here) I'm glad your back, and happy to see you feeling better..

Take care