Probably not. If you have any questions on the matter, contact the IBT or Dan Brannan (above), they may be able to suggest other ways by which you can support your fellow airmen without placing your own job in jeopardy.

This business doesn't need heros, just guys who know in their heart what is right, and try to do it.

I would be extremely wary of using sick and/or fatigue calls in order to stay out of conflict. Airline managers have traditionally claimed abuse of those policies as justification for disciplining pilots who have exercised them. If your union or in-house pilot association were strong enough to defend you from such a charge, it's unlikely you would have been in the situation in the first place.