The e-petition opposing the move was set up by Adam Tansey from heart charity, Keep The Beat.
Danny Brough got the Giants on the board, but Jordan Tansey and Stuart Reardon completed the rout.
Neither Pfizer, Robert Tansey, nor Michael Aondoakaa could be reached for immediate comment.
The Welshmen eventually crossed the line twice more when Vince Mellars put Tansey clear before Reardon extended the winning margin further.
Scott Donald, Jordan Tansey and Matt Diskin also went over for Leeds, with Jason Demetriou, Kevin Henderson and Luke George responding for Wakefield.
But Crusaders scored twice more through Jordan Tansey and Jarrod Sammut before Scott Dureau's late drop goal and Blanch's second try sealed victory.
Despite missing several big names, tries from Jamie Jones-Buchanan, Jamie Peacock, Jordan Tansey and Brent Webb put the Rhinos 24-0 up at the break.
Adam Tansey's young son Albert had life-saving surgery at the unit.
Last year's clash between the two sides had ended in controversy when Jordan Tansey scored a highly debatable try in injury time to snatch victory for Leeds.
Substitute Tansey scored with his first touch of the ball on 27 minutes and Webb made it four tries just before the break after juggling with the ball.
According to Prof Tilli Tansey, a medical historian at Queen Mary University of London, who has studied the unit, it became an oddly popular form of package holiday during the post-war years.
Danny Tickle, who had converted both scores, kicked a penalty soon after the break before playing a part in a fine move also involving Jordan Tansey and Richard Horne which ended with Long crashing over.
Despite their eight-point deficit, the Rhinos created a sustained spell of pressure on the brink of half time, but Jordan Tansey spurned a gilt-edged chance to bring Leeds to within two points of regular season champions.
The Wildcats were rewarded 10 minutes later when Demetriou found his way to the line, but Tansey put Leeds back in front in the 21st minute and Diskin extended the lead early in the second half.
As the game progressed, Hull appeared more fatigued, and when Richard Horne's laboured pass went loose Daryl Millard pounced and stepped twice before fending off Tansey to score a great try - again converted by Cooke.
Hull coach Richard Agar's plans were in tatters as early as the sixth minute when, having resisted the temptation to recall regular full-back Jordan Tansey after suspension, by keeping faith with Craig Hall, he was cruelly rewarded.
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