You'll get some perspective on this matter if you listen to the podcast the MEC put out in the last week or so.

The management types who are working the ramp (carrying bags, pushing wheel chairs and fetching strollers) made a big deal about having had training, and are covered by Frontier's insurance while working the ramp. Management has had to come out with explicit instructions for the pilots - don't carry bags / push wheelchairs. It's not the job you're insured for.

If you feel your nature won't allow you to keep your labor to the position you were hired to perform, keep in mind that your injury wouldn't be covered as an OJI; you're on your own insurance if you get hurt. If you break something, we once had a well intentioned Captain operate the jetbridge to allow passengers to disembark, (what could go wrong?), you could find yourself out of a job.

Keep in mind, none of the rampers or flight attendants are going to come cut your grass, drive you to the doctor's or make your mortgage payments when you get hurt doing THEIR JOBS.