I always thought that flagging would get the comment put into a review queue (one that would put even your ability to flag at risk), but it seems that mass flagging gets you an automated flagkill of late. People can get flagkilled for not sufficiently loving particular products or for not being orthorexic enough.
As for the N900, I just wanted one or two more hardware iterations (the design flaws were annoying, and a couple mentioned in the OP.) The N9 looked great, but I couldn't get over the loss of the keyboard (although of course that was our dictated future.) The Meego transition seemed unnecessary and annoying (not the UI changes, but everything else), especially the move to rpms from debs. They were just hostile to Debian mainline for some reason; if they had been less hostile, their work would have survived without a break even after Elop intentionally tanked the company. That proprietary moat is just irresistible.
iOS and Android literally grabbed the designers of Maemo/Meego and WebOS to update their horrible UIs. Back then, they were still even refusing to multitask. Android copied WebOS almost exactly.