There might be reasons. For example if a long standing, highly trusted account gets hacked, it's useful to get the warning (orange color) after a single feedback, as that can be quickly left.
Interesting point.
I gave Lauda new positive trust and the ? ? ? went away.
Credibility talk? From a scammer?
It was an experiment to see what would happen. I don't plan on doing it again.
According to what I have learned, what I did actually hurt Lauda's trust rating. Any new unique positive rating will make one '0' (i.e. if you have ? '??). However, if you remove an old rating such as mine.. my rating is 'fresh' now. Aged ratings give more trust points (i.e. that's why total ratings grow over time).