100% agree with this. It is very important to ''filter'' your buyers before the actual order is being placed.
For example, if a buyer is rude, demands guarantees of sales ( there is no such thing in digital marketing ) or asks to communicate outside of fiverr, those are instant red flags and I simply refuse to work with that buyer. In 99% of the cases, those are the buyers that request revisions for no reason, or they keep requesting revisions just to ask questions, basically delaying the order delivery and keeping you hostage.