I don't like doing negitive comments. Also when I comment I like to see that the person read it by acknowledging it. When they don't I quit commenting.
WOM, your anti-virus may have been trying to scan everything constantly instead of just net traffic. When I made it scan only net traffic my computer sped up noticably.
Unlike you I have no compunction at all about posting negative comments, I just try to do so in a constructive way with details. I've found I learn more from one or two negative comments than from a dozen positive comments.
In this vein, are they any specific reasons why you didn't like my green theme?