If you feel the Manuals have been tampered with REFUSE the airplane.
Get a grip! The big yellow airport marker tabs are not part of manuals they are not required they are a convenience item. Saying that removing them is "tampering" with a manual is just stupid.
I couldn't give a load crappie if they were there or not.
Legal disclaimer
(BTW, overly sensitive church lady monitor. A crappie is a type of fish and I was referring to the live weight value of said fish, NOT excrement as you might be inclined to interpret and infract me for.)