If people really wanted to stick it to Simon Cowell, they just wouldn't watch the show or ever buy anything from an artist from the X Factor.
Joke acts will always pick up a small following because viewers find them entertaining. Producers know this, which is why they always make sure they have at least 2 potential joke acts in the live shows. This year was supposed to be Bupsi and Reggie and Bollie. One hasn't worked out but the other has proved to be more successful than I reckon they had dreamed of.
Still don't think R&B will get near the final. Look at the supposed popularity of Only the Young last year - in reality, they were nowhere near faves and I suspect the same of R&B this year. I compare the two because both are in that category of "fun" acts (though OTY were a serious, decent act till live shows).
Last year, Blonde Electric were Louis's choice for joke act but got it wrong - no one liked them. Stevie was the producers choice (brought back in as wildcard) and they got this one right - though again, he was pretty much always just scraping through the voting.
Joke acts are supposed to go quite far - it's what the show wants. But they will never win because most people who watch aren't interested in sabotaging Simon Cowell - they like the show and want a decent winner. Reggie and Bollie may not be a complete joke but they certainly aren't serious enough to win and for certain will be thrown under the bus if they got anywhere near the kind of votes that could win them the show.