I'm new to multi-night warewolf so I'm just going to go with the group on lynch/not lynch on the first night. I understand both arguments and I think it comes down to whether or not the target is random or if you're going off of some information (even if it's flimsy). 
If it's going to be random, we're more likely to eliminate a good guy and do there warewolf's job for them. So we'll be down 2 people tomorrow. 
On the other hand, if we have someone who has been more suspicious than others, we can take a shot and even if we eliminate a good guy we're in the same boat as above.
So I think if we don't have a target in mind, we don't lynch at random.