I hesitate to post in threads like this because I think they perpetuate hate, which Star Trek was firmly against. But honestly, I can't fathom the negativity toward remastering Star Trek.
Doing so isn't destroying Trek, it's preserving it. As America & the world move toward HD broadcasting, networks are going to favor shows that are in this format.
Sure, we could leave Trek alone, untouched and perfectly preserved and allow it to slowly fade from memory as the world passes it by. Hoping that TV Land or somesuch might play it at midnight every few years. Or we can have the shows remastered in High Definition, broadcast on any station that wants them.
Star Trek was always about the stories, and not the effects. So why are we arguing about the effects now? The only reason the old effects don't work in HD is because of the film quality, not the artistry. Are the new effects perfect? No, but they're more appropriate for today's technology.
But the most important thing is, if this remastering exercise keeps these episodes out in front of people so the stories can be told again and again, then let them.
Guys, remastering Star Trek is a good thing. Take your geek glasses off for a second and look at the big picture. Star Trek isn't vanishing, it's being preserved for a whole new generation. Star Trek Lives!