Motor Backwash - problem or not?

[Spaceman]

Not sure there is any real science to support one technique over another. I remember old timers swearing that if you toss a small handful of pebbles to evoke curiosity it supposedly would draw crappie in. I too have drifted into and bumped laydowns with little or no impact on the bite. I am sometimes a bit clumsy and noisy in the boat making noise dropping things or stumbling around...and the bite is there. For some reason I still believe approaching a site quietly is preferable...maybe my superstition I normally try to drift to a site with the motor off. If necessary, I will nominally use the trolling motor and use a home made noose to quietly grab and secure the boat to a laydown.