I haven't seen nor experienced this, in person or online.
Most of the opinions expressed about INFPs are just very reductive. I think they are based more on what they imagine the profiles to look like rather than real experience with INFPs. I think the real experiences may frustrate them because we're not as simple as they imagined us to be. They want to insist really hard how we're simplistic, sentimental pushovers, and then when that's not what they get they are annoyed that they don't know what to make of us and thus, they don't know how to deal with us.
That's the big problem I encounter in life - people don't know how to categorize me, and that can result in a negative dismissal early on. People aren't comfortable with stuff they cannot easily categorize, because they need to order reality so they can navigate it, and they want to do that ASAP and as easily as possible. This is most common with J types, but it's a human thing in general. xxFPs are possibly the least likely to do it, but even we fall into the very trap we may despise and find limiting.