As much as I can completely understand what you're saying Dark, I don't think I agree with what you're saying to be true.
Personally, everytime I change the speed in game whether its faster or slower, everyone asks for more, everytime.
Everyone loves it, I often get told that that's why they like coming on our servers cause we let people have a bit of fun and it's not dead serious 24/7. Heck, a lot of people ask me to change the speeds to 300% and other crazy speeds, and I have to sadly tell them there is no such thing. People even complain that not enough of the admins do this kind of thing.
Yes, there are players, such as yourself, who prefer to keep it the standard game but majority of the people who come on the servers like the change every once in a while.
Obviously everything should be in moderation, but from what I see when I play on the servers, these changes dont happen often and not for very long.
So either I have the magic touch or I've been fortunate enough to only change the speed when there's been an agreeable crowd on the server, orrrrr people just like it xD
Basically what I'm saying is, most people do infact like the speed changes and only a minority of people don't like them/have a problem with them. And I dont see admins using these commands necesarrily for their own selfish amusement but rather the server as a whole (or I do atleast.)
Regardless, there is always going to be one or two people on the server who don't like it. But for every couple of people out of 50 who dislike it, the rest are enjoying themselves and having fun.
Just something to consider