Well i guess it depends what claimed "facts" your talking about.
Instead of just discrediting claimed facts, how about check out some resources and find out.? Being close minded and just assuming they aren't true isn't a very open minded approach. People like to instantly discredit things if it doesn't fit their agenda, they will just assume its forum BS talk. Same goes with the other way around. people tend to agree with commando talk if they are on that persons side or are a fan of the subject.
Sure, lots of smack talk get thrown around on forums, but some of these things are true and can be proven, you just have to specify what things sound far fetched to you and maybe facts can be provided.