Limits what an Assigner/Administrator can see about me.
I am a member of two umpiring associations. Based on the FAQ I read about what the Assigner can see about me, he can look at the diagnostics page to see WHY i am unavailable...
Now, if the two Asscs. get crossways w/ each other, I might be "frozen out" of assignments from one or both of the groups.
My Concern: I don't see how it is anyone's business WHY I am unavailable, but especially I don't want one organization knowing that I am working for another organization just that I am unavailable for those times.
Your understanding of the Diagnostics table is incorrect. The Diagnostics table provides assignors with the systemic reason for ineligibility, but ONLY if you said you were available. If you set yourself as available, but the system finds a reason why you should not be eligible, the system will overrule your availability and provide your assignor with diagnostics why it did so. If you simply mark yourself as unavailable on your calendar, the system provides no further details beyond that distinction.