This is my second semester teaching online and I am blown away by students who rarely or just plain do not check their email. Two weeks have gone by and students still have not purchased access to the course website. (I'm using MyMathLab.) I've sent numerous messages the last two weeks warning them that they would be dropped if they don't start the work.
I know that some of them are waiting on financial aid, and if they had said something like that upfront I could have done something about it. Others, I'm not quite sure. I gave them info on how to get temporary access, and I KNOW it does not take a week to get started. I'm not tenured yet, so I'm not sure how firm to be with these drops. But two weeks with no work???
Do you have an instructor withdrawal process? We can have students removed from the rosters after 10 days from the beginning of classes if there is no activity. I usually don't do anything because they will either catch up or drop and I like to leave it up to the student.
If you don't have a process, just stick firm with your syllabus policy, whatever that is (no credit for late work or a percentage off for every day it is late). They are already in the hole, but if they can dig themselves out, that is on them.