yes I have watched all the anime
*HIGURASHI SPOILERZ*
Remember Rena and Mion saying 'You'll suffer the same fate as Tomitake' or 'We'll do to you the same thing we did to Tomitake' or however the hell it was phrased near the end of the first arc? They were talking about writing stuff on his arms. With a marker. Which also answers why Ooishi would tamper with Keiichi's note; he was dead serious about solving the case, and Keiichi's 'evidence' just made him look crazy. None of which was really that apparent in the anime!
(unless it was the Yamainu that tampered with the note in which case lol me)
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'From now on, I'm going to call you Baron Squinty.'
KrahenProphet and Kana are on opposite ends of the Awesome Spectrum.