Geeze, I guess we should stop using Google. They've been accused and suspected of much worse by a lot of people. I hope that's not what you meant.
Short answer: Yes. Downloading and running arbitrary binaries from the web inherently a quite dangerous thing do to, and I only feel comfortable taking such a risk with sites I trust. I no longer trust Sourceforge and there is very little they can promise me to make me start wanting to download from them again.
Well, I don't agree¹ with your method of evaluating trustworthiness (which seems to me rather too quantized and "chastity"-minded), but at least you know exactly what you're doing and who you're trusting.
[1] Read as "I believe it's sub-optimal for a given cost-benefit formula, after some assumptions about certain variables and certain opportunity costs, and other methods would likely be more useful in context."
Isn't it a hard fact at this point?
In general, the way the comment was worded? No, suspicion does not equal hard fact.
We were talking about the latter.