Maybe it's just me, but I don't read that as only cheering and cheerleading. Tom said "keep the sniping to yourselves. If you want to wish him luck, that's fine. If you would like to help him out, that's fine. if you have real information that will actually help him, also fine."
Real information can be both cheering and non-cheering. 'Don't go this route", or "don't use this equipment" isn't exactly cheer leading but clearly still under the umbrella of "information", no? And if we look historically at almost every post in bikeforums, there can be non-cheering or non-cheerleading comments about routes and equipment, so I think it's very safe to say we have a huge amount of precedent set as well to refer to. The point Tom was trying to make is that Ryan's ride became the target of what he put as "Politically charged, or insulting comments, or snipes, or ripping on him".
Still not seeing "ONLY cheering or cheerleading allowed". Thus I reiterate, the Historian's post I responded to was not accurate.