Heroes: Time Travel for Idiots

Season 4 of Heroes, the X-Men for the 'I'm not a geek' geeks, has just started it's run in the US, and watching the first episode I once again find myself wondering 'why do I watch this tosh?'
The answer is simple really, I like action, especially when that action is centred around various superpowers that help me indulge in my fantasies of what I would do if I had some amazing super ability of my own, which is why I quite enjoyed the film 'Jumper'. Actually, there was one other thing about Jumper that I liked, and a similar attraction also exists in Heroes in the form of Claire, oh man, how I would like to wreck that chick...
But back to the topic at hand, we find ourselves with yet another set of plot inconsistencies, which it seems the writers of Heroes are now throwing in as a social experiment to see how long it takes before everyone has given up on watching the show bar the most gibbering of idiots... (yet I'm still going to carry on watching, less said about that the better). What really gets my goat is all the time travel plot lines, I have nothing against time travel as a plot device, as long as it's done right, but seemingly every time Hiro jumps into the past, something happens that clearly would have had a knock on effect that would have altered everything we have seen so far. This time around, Hiro verbally expresses this, only to have the writers go so far as to have another character tell him that it's OK to change 'just one thing' without altering all of the past... resulting in Hiro changing 'just one thing' that anyone who remembers the events of season 1 and has just a shred of intelligence would realise that it would have completely altered most of the events we have seen anyway (namely it would have meant Ando would never have sought out Nikki in Las Vegas, and the knock on effect from there). what the writers have tried to do is make this 'one thing' that Hiro changes different from what he originally intended to change, thus an attempt at misdirecting the audience was made, and it fell flat on it's face.... again.
Personally, I find this kind of thing insulting as a viewer, it's as if the production team don't believe their viewers have the intelligence to realise these things... either that or they don't have the intelligence to write a coherent story, but then who's more the fool; the fool or the fool who follows him?
... but it does have some entertaining (enough) action sequences, albeit brief as they are, and the corruptible looking Hayden Panettiere... so I guess I am committing another 23 hours of my life to this over the next 6 months