marking? Isn't that something feral cats do?
When someone says it's still God's organization even though everyone in it is imperfect....here's an illustration, such witnesses seem to like illustrations:
Suppose there's only one hospital in town. You need medical attention, but you know that your neighbor got an infection in that hospital and was also billed improperly. Over the years some of the doctors and nurses have been charged with malpractice and some are now in prison. Some patients have died on the operating table; others may have been molested by the custodian. The doctors have at times given wrong diagnoses and have had to take patients off their meds and start them on different meds. Many patients are on the internet, posting about the bad care they received there and how they are doing much better under the care of a different set of doctors in the next town. The staff at this hometown hospital, however, keeps warning the townspeople not to go to that other hospital because they will die if they do.
You need medical attention. Just because "some" of the staff there are imperfect, it is still the only hospital in town (just like "in Noah's day there was only one ark.") . What would you do?