"... "Oh no without the picketer's I would never had the tract..."
The people who handed you the tract were doing two things, carrying around signs and handing out leaflets. It wasn't the picketing that you paid attention to, it was the leaflet.
You can't say you would "never" have had the tract, you might have acquired the same information in some other way.
The fact that you made fun of the picketers but did accept a leaflet seems to support the notion that picketing is relatively ineffective, even offputting.