Why all this fuss over a missing manhole cover? 

The fact that the removal of this plaque – which basically commemorated the country’s switch to parliamentary democracy (whether that was successful or not is irrelevant) – cannot be discussed or even mentioned, strongly suggests that the removal was officially ordered. And that is also why the police will not investigate. 
Misterwhisper
Doesn’t bode well for elections next year, either.
pookiki
Again, only “bad” people would be interested in this. So anyone who is interested in the events commemorated on the plaque 
are either terribly misguided or “bad”. 
FCCT will need to move to a neighbouring country if it wants to hold substantive discussions regarding Thailand. Thailand used to be wonderful.
yellowboat
What a fuss over a round piece of metal cemented into the middle of a road! 
Before it was removed I bet none of you had even known it existed.
tukkytuktuk
The plaque itself is irrelevant. What is of importance is what the plaque represented to the Thai people, the way in which it was removed (and by whom), and the actions/reactions of the incumbent administration to the questions raised by its removal.
The directive forbidding the FCCT to discuss the subject merely serves to confirm what a sensitive issue this is, and how the government was complicit in the skulduggery that was employed in its removal and replacement.
The whole affair doesn’t bode well for Thailand.
nisakiman
Don’t forget it was not only removed but replaced, the wording of the replacement says it all!
RigPig
Thaivisa