Because for my work and research I spend most of the day on the internet, I do rather a lot of trawling through rpg-related forums and blogs. (This is about the only perk of spending day after day in front of a computer.) And because people who post on forums and blogs about rpgs are an ornery lot, this boils down to reading lots of amusingly vitriolic flamewars. (rpg.net is the indisputed king of these, though the rpgsite has its moments.) A waste of time, perhaps, but no more so than watching Japanese TV, and occasionally more educational and edifying.
A common theme running through these flamewars is that an awful lot of problems get blamed on rpg systems, when really the fault is with the players. I call this the Forgetting That One Shouldn't Behave Like A Dick Head phenomenon.
Some examples might help to illustrate:
1. Older versions of D&D are bad, because they rely on individual DMs' judgement, and this means that players who "get on with the DM" or can "convince him to rule in their favour" have an unfair advantage. Often presented by fans of 3e and 4e, which supposedly leave less to each individual DM's judgement and are thus "fairer". This is a not actually a problem with older versions of D&D. It is a problem of DMs and players behaving like dick heads and being biased and easily swayed or excessively manipulative, respectively.
2. D&D 4e is bad, because it forces everybody to do things a certain way - if you are a Warlord you have to do this or that in combat, and if you don't, other players will accuse you of failing to properly fulfill your role and not being a team player. Again, not in fact a problem with 4e, but a problem of players behaving like dick heads and being inflexible and mandarin.
3. Cyberpunk 2020 is bad, because you can manipulate character generation and equipment a certain way and create characters who are virtually indestructible killing machines. Not in fact a problem with Cyberpunk 2020, but a problem of players behaving like dick heads and trying to create munchkin characters to ruin everybody else's enjoyment rather than just participate in a fun game.
4. The Rust Monster is bad, because DMs use it to spoil players' fun by destroying all their hard-earned magic items. Not in fact a problem with the Rust Monster, but a problem of DMs behaving like dick heads by deliberately trying to piss off their players, and also of players behaving like dick heads and being cry babies and forgetting that it's just a game.
You get my drift, anyway. As a rule I tend not to read much 'GMing advice' on blogs, because I think it all boils down to something rather simple: play with cool people who are your friends, not dick heads, and don't be a dick head yourself. Mostly it all works out fine from that initial foundation.