Someone pointed out how it can be coding problem actually... Namin? recalls (or think it was) Mr. Beeman or someone from Razorblade who said that it can be a script problem with the game, which can also cause these problems. This is a possibility since Namin? heard a "cursing sound" (Mr. Cucu said he heard the same thing too) during the "Disconnected from Server" message, which is supposedly built in by eA to signify that there is a problem with coding. That is one possibility.
Another possibility is factors beyond GM's software, hardware or SvN's control. Ms Mystia has mentioned that the internet provider Videotron in Quebec (where the server is) has been going insane lately. (Mr. Anak doubts this however... if the forum is fine, it can't be the internet provider then hm? But Namin? knows nothing about technology to say if this is a good reasoning or not) The other times heRO server is down is due to a blackout. Another time it was because some workers simply cut off Ms. Pandora's connection with some renovation related issue at the apartment.
More possibilities than just SvN or hardware, at least to say~
(And ranting is never bad... at least for the ranter's point of view. It reduces stress level and is psychologically healthy to rant, according to what Namin? learns in university.)