he wouldnt do that, coz madara showed right now, that he knows about the risk for the user in edo-tensei...why should he summon him to eventually let him break free, and end up in hashi vs madara again? dont think so...he seems to be able to defeat most of the living completely on his own.
and perhaps tobirama wasnt trolled that bad. perhaps he didnt know about the seal(s) to undo the edo-contract. perhaps it became forbidden in konoha out of another reason. (dunno, perhaps that one needs bodies/victims to create edo?doesnt seem that morally correct to me.but dont really know how tobiramas jutsu really works, so light me up ;-) )