The problem with honor systems is that people will break it, with good intentions or not-so good intentions.
I'm LDS but I think the Church has really got to put an actual procedure in place for posthumous baptisms to show that the person submitting the name can prove relationship. I'll even take distant relationship, but the ground work and such still has to be done and documented.
I don't have a problem with submitting a name ans someone else does it, but I do have a problem with names getting submitted with no documentation that they are actually a relative.
Well, ya know, it might be helpful to outsiders if the Lds Church communicated that "dishonorable acts" committed against its "honor system" resulted in temple banishment or something along those lines. We don't need names. That's private. But what's the general policy for those who act against its system?