No... Soleron in fact says to tanstalas in that post:
Voting No Lynch is not suspicious in itself.
What is, however, is subsequently adding nothing to the discussion; here are all of his posts:
"Nothing that makes any one seem guilty to me yet. Although this game did just start. For now...
Vote: No lynch"
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dsister said:
So Mario any reason why you don't want to have any conversations today? Why the need to end the day so soon?
HoS: Supermario128
"I said "for now". As in, if somethign else happens I will change it. Don't over look things so much Dsister... At this point in the game nothing has happened."
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dsister said:
Of course nothing has happened yet. Nobody is taking the initiative. Instead of just coming in here and voting why not ask questions?
"Because it is late and I am tired after a long day"
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"My roles sucks too."
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Which reads to me like: Vote No Lynch because it's safe; then switch off posting unless challenged.
I just noticed that he made a point of highlighting why supermario should be suspected, which would be odd to do to such an extent if he was on his team. Not that it's impossible that he's Mafia A group, just it seems unlikely to me. Of course he could be Mafia B... but I'm just making observations on what I see as I reread the thread.