Somewhere on Wikipedia there's mention of the fact that watermelons aren't in the Cucumis genus--I think the infections have less to do with vampires and more do to with canteloup-garous (the dreaded werecantaloupes).
In early films there's also 'Tim' where Gibson plays a slightly daft young man. Spoiler: Tim does nothing, slightly daftly, for 109 minutes. As it turns out Gibson was much better at being thoroughly retarded in his private life.
By all means mention soap operas, though I doubt Australia can claim world-leading awfullage (much as we try). Brazil? Syria? Nepal? Surely there's quality dross being hoisted on the airwaves in Burkina Faso?
I don't know about your expectations of Gibson. Wasn't it obvious from The Bounty that he couldn't act his way out of a paper bag?
Ha--I'm just working up some ideas for another mashup-style book in the Pride and Prejudice and Zombies vein. (You'll want to watch for the Steinkirk scene in "It's the Great Vampire Pumpkin, Charlie Brown!")
"The belief in vampire fruit is similar to the belief that any inanimate object left outside during the night of a full moon will become a vampire. According to tradition, watermelons or any kind of pumpkin kept more than ten days or after Christmas will become a vampire, rolling around on the ground and growling to pester the living. People have little fear of the vampire pumpkins and melons because of the creatures' lack of teeth. One of the main indications that a pumpkin or melon is about to undergo a vampiric transformation (or has just completed one) is said to be the appearance of a drop of blood on its skin."