A few weeks back, my FC and I made a t9 PF, with only two rules: know the fight, and no sold bonus. Simple, right? First go, we had a guy join who asked if he could despite not clearing on the character he was playing, claiming it was an alt. Leader allowed him to join, as he had politely asked and agreed to leave if he made too many big mistakes. Turns out he was telling the truth, and it WAS an alt. Next week, we make another t9 PF, same rules. Party fills up, everyone calls items, we go in...and there's a sold bonus, and the one person who doesn't have dreadwyrm gear/t13 title insists that they've cleared -- they just "didn't clear t13 yet", that's why they had no DW. We kicked them, got a new person, went in, and surprise, no bonus!

If you can't get a learning PF going, POLITELY ask to join a farm group. Not everyone's willing to carry, but it's better than lying and sneaking in.