This is simple.  Folks who would do wrong with their guns will ignore a ban.  Folks who would abide by the ban are never going to be a problem for anyone.

This law really seems to reveal a mistrust of law-abiding citizens.  In other words, the governor apparently believes that law abiding citizens might "snap" and do wrong with their concealed weapons.  There can be no other understanding of this; surely we all know that criminals won't pay attention to the ban.  But law abiding citizens would obey, and not have a gun on them with they "snap"... ;)   That's really it, isn't it? 

It's wrong to have such a menial view of gun owners.  The more likely scenario to see played out if concealed carry holder were still allowed to be armed in government offices would be that a criminal bent on violence might be stopped by a concealed carry holder.

The ban on open carry I can sort of understand; it makes folks nervous, and makes a person the potential  target of a gun-grab.  I'm not a fan of open carry for many reasons.  But concealed?  You need to allow folks to utilize the permit as issued.