Add spaces: YoushouldgetanewsignaturewitheveryreloadafteryouenablethePoisonDataoptioninPaleMoonwhilethesignatureshouldnotchangeatallwithoutthepreference(providedyoudon'tuseotherdefensivemeasurestoprotectyourbrowser).
You should get a new signature with every reload after you enable the Poison Data option in Pale Moon while the signature should not change at all without the preference (provided you don't use other defensive measures to protect your browser).