We very rarely lynched anyone on Day 1. I understand how that would basically set up Scum to get a free easy kill on Night 1, but its just the way I was introduced to the game. Sometimes we lynched someone on day one, other times not.
In regards to your second question of why vote for someone for “no reason” - why are you calling me out on this? Does anyone in this game have ANY reason to suspect anyone else? Aside from the Scum team knowing whom each other are, nobody else in the game can really have a suspect at this time, so just about everyone’s vote at this time will be for “no reason.” It can start conversation amongst us by maybe the votee getting defensive and countering votes and in the process bring about more discussion. This may, in turn, bring about meaningful discussion.