strangers challenging you on the course

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so today my dad and another fellow named dale were playing at the local muni.  we'd finished our regular 18 and were going to play another nine when two guys pull up behind us on the first box and say "hey fellas, you want to scramble 2 against 3?"  i look at dad and dale, who just shrug, and i say "sure, why not?  do you guys want extra strokes or anything for having one less player?"  the guy says "nah," all cocky.

now my dad wasn't having his best round ever, but dale was hitting some great tee shots and chips, and i was just being fairly consistent all around (shot 78 for the par 70 course), so i knew we weren't going to get totally crushed, but as confident as these two were acting, and pulling up and challenging us 2 against 3... i was assuming they were a couple of scratch players looking to take our lunch money.  that didn't quite prove to be the case.

first hole, the cocky one (chris, his name was) hits a huge hook into a pond.  his partner (blake) swings right under his ball and pops it about 20 yards straight up into the air, and it lands about 10 yards in front of the box.  they play the 10-yard drive and manage to pull out a bogey.  dad, dale and i get an easy par.  second hole, we roll in a birdie, chris and blake get a par.  third hole, blake goes OB right, chris goes OB left.  they wind up with a triple bogey to our par.  fourth hole, chris and blake finally put one in the fairway and get a birdie (however, i chip in from off the green to also get a birdie for our team).  fifth hole is a pretty tough 165 yard par 3 to an island green.  i stick my shot 10 feet from the flag, chris goes in the water, blake hits the bank but rolls back into the water.  so dad, dale and i are standing to the side of the green after i've marked my ball, chris and blake are looking for blake's ball so they can pull it out and drop there.  after a few minutes of searching and i guess ultimately not finding the ball, they get in the cart, drive back towards the fifth tee box... then keep on going.  we never saw them again.

i mean really, come on.  we hadn't been ragging them or anything, we'd been nothing but nice.  i thought it was both comical and downright rude all at once for them to just drive away like that.  granted we had a 5 stroke lead on them (about to be more, since we were in prime birdie position and they would be trying to save par from the designated drop area 50 yards out), but still... if you're going to abandon the round, at least come over, shake hands and say as much.

you guys got any stories about strangers challenging you on the course?