im not technically a tracker thoAll I can say is that it's not worth lynching me today when a blatant mafia has revealed themselves and is pretty much proven to be a poisoner. I don't think there are passive visiting abilities in Mafia for this case, as it wouldn't be fair to Trackers such as yourself which couldn't detect such actions. Usually, with a poisoner such as Erik, it's obvious that they visited someone through logs; and this is the disadvantage to poisoners as without their visiting being active, then they won't be detected at all. It would be dependent on a cop report only. Anyways, I think it correlates that Erik is the poisoner as a) his targets die and b) he has to VISIT someone to poison him. Oog was visited by Erik and lo and behold, he dies. Very very suspicious and the fact that Erik was the ONLY one who visited him, it's more probable that he is mafia than me having a passive visiting ability when I already have the roleblocking ability. It would be a combined cop/roleblocker which is far too OP.
and Roob also visited Ooglie