I'm gonna take the risk and assume Roden is solo scum.
And I'm going to assume that... we, at best, have two solo scum (Either 2 unteamed Mafia, or Mafia and Mafia-Ally.) But, it also possible we have one really powerful scum.
How? I blocked Roden last night and Vector claims to be poisoned. You also seemed ASSURED of poison's existence on D2 when there was no evidence of it. If Vector's claim is the truth then it's like you knew, impressive!
Toony. You are retroactively trying to find evidence when other, more simple (and incredibly obvious), explanations work. Like this: I was convinced of poison's existence because I believed that Vector was Town. I thought Vector was Town because NJW2000 confirmed my action and target (thus making NJW2000 Town) and Vector was targeted by Prime. Why would Vector lie about that if I think Vector is Town? I will cherish this moment between us. This is the moment where you have a choice: You can choose to waste your Day 3 like you wasted your Day 2 trying to frame me for being scum, OR you can look at what I presented: Factual arguments, logical deductions, processes of eliminations; and realize that removing you was the correct option, especially since you didn't really do anything to help narrow it down.
Now, to what you said that actually matters.
Three possibilities that rely on knowing how the scum work:
1.)
These abilities are a mix of Day and Night abilities. There's no reason to believe that the Poison is the result of an action that was done during the Night. It could just as well have occurred during the Day. The one thing we can confirm if NJW2000 is Town is that the Prime happened at Night, but perhaps the Poison is a Day action?
2.)
These abilities are automatic. Perhaps the Poison was an automatic ability that cannot be roleblocked. If it's automatic, there might be limitations to its usage.
3.)
Some abilities are immune to roleblocks. This seems unlikely, as it would completely negate the ability, but I'm mentioning it for posterity. If NJW2000 is not scum, then it's possible they were targeted by Poison last Night, and Vector was targeted by Prime as well. This could infer that the Poison ability is immune to roleblocks, but the Prime is not. Would you necessarily put it past FoU to put in a essentially useless power like that?
And this is all in addition to someone else mucking up the whole game.
Basically, taking the relative power curve based on role claim:
TricMagic is a Fruit Vendor (or whatever he is). This is a low power role.
EuchreJack is an Investigator. This is a low power role.
I am an Investigative Student. This is a low power role.
You are a Vengeful Roleblocker. This is a low power role.
Vector is a 2-Shot Poison Doctor. This is a medium-low power role.
Roden is a Delayer. This is a medium power role.
NJW2000 is a Voyeur. This is a high power role.
Maximum Spin is a Arsonist Jack of All Trades. This is a very high power role.
I'm not making any heads or tails of this.