Two worries:

1. Doesn't applying to many funds at once end up taking more grantmaker time which there is already too little of?
2. Doesn't this lead to some kind of funder bystander-ish effect? Ie. funders thinking "better not fund this, lots of other funders know about this, better fund the people who just applied to us and are less likely to get other funding counterfactually"

I really like the idea! Maybe that's just me, but I'd much prefer it if the content was visible without an account. (This actually stopped me from engaging with the content)

That's a good point, that the upset person in the conversation might be prone to be taken less seriously, even by themselves, especially if their reasons are hard-to-describe, but not necessarily wrong. 

Looking back at theses situations through this lens, I actually think at one point I didn't take myself seriously enough.

If my reasons are fuzzy, and I'm upset, it is tempting to conclude that I'm just being silly. A better framing is to view negative emotions as a kind of pointer, that says "Hey, in this topic there is still some unresolved issue. There may actually be a good reason why I have this emotion. Let's investigate where it comes from."

For the non-offended person, I think it already helps a lot to have the possibility in the back of you mind, that a topic may be emotional. For example, many people aren't aware that privacy is a topic that can be emotional for people.