First off, the video above is classless.
In our congregation there was a brother who thoughtlessly put his hand in his pants to scratch himself before he reached to shake yours. Weird? Yes, but not because of the religion. There were overzealous ones who sang "We're Jehovah's Witnesses" while going door to door. (Quite eccentric.) People are people but since JW's are obligated to put up with the weird, classless and eccentric behavior there are a great many in the congregations.