Name a person who likes Day 1.
Camoclone
bbninjas
Your suspicion of PMJ may be a lead, but don't use the word solid about it again. Calling a Day 1 lead solid is ridiculous unless you have a whole heap of incriminating evidence and the other guy's role PM just in case.
Solid is an a describing word and as such is used to compare something to another thing. A solid thing can be solid D1 with a lot less evidence than something would need to have to be solid later in the game.
If we were suspicious of every person who dislikes Day 1 and yet posts then we would get nowhere. Making a mention about vote tags has nothing to do with contributing to the game even as a facade, because it doesn't contribute. It doesn't contain anything even closely related to who or who isn't suspicious.
Not counting his post pre-start, PMJ has made 4 posts. 2 of these were replying to Celever, so that leaves two posts. One of them was acceptance of the fact that his initial post had a flaw (in other words, that the vote tags don't add ##). So PMJ has only made one post stating something, all the others were replies. And that post he made can't pretend to be a contribution facade even to a newbie. In other words, he has pretty much done what he always does Day 1: nothing. Accusing him of being unlike himself has as much foundation as a sandcastle on the beach.
I'd like nothing more than to follow bbninjas train of thought and say that Celever is suspicious for suggesting that an experienced player should be lynched so early, but I have already thought of ways to counter that thought, among which the fact that Celever does what he always does and of course that it is Day 1 and we can't expect anything better.
To sum it up, I'm against the idea of lynching PMJ Day 1. He has experience, and if he is town he could be helpful. "But if he is scum he will screw us up!". Doubt it. In order for even the best scum player to screw the town up so early and so badly is for the scum team to pull very risky stunts, and these have such drawbacks that attempting them this early is usually a wrong idea, as there are way too many chances of giving town the advantage.
Now this is where you go wrong. Not lynching someone because they are a decent player is always a bad idea. If they have enough evidence against them then lynch them... end of story.