Crazy riding isn't always down to drink. My second pilly experience many years ago made me take the decision never to get on the back of anyone again and I haven't done since. On the way to Scarborough my rider decided to get involved in a race with another bike that lasted about 20 miles and made me fear for my life. When we arrived in Scarborough I jumped off the bike, had a word in his ear with my fist then got my Dad to pay for a train ticket home
The riders in control, the pillions just there for the ride and although contributes to the handling by leaning etc, thats it IMO