I never saw a single person "dodge" in Star Wars, and I think it was universally agreed upon by children across the world that "Bad guys can't shoot good".

Did they really need to build a fucking set for that?

"Bad guys can't shoot good".
Agreed. It's simulated danger to keep the action moving.

Did they really need to build a set for that?
That's called dressing the set, and when you have the budget, spend it! TV is all about the visuals.

It was a Stars Wars episode #2.

Dude, the Stormtrooper are clones. Did you ever make a copy of a VHS copy? They're always shittier than the original.
Bobba Fett > Stormtrooper

Okay, I'll be that guy.

(assumes Comic-book guy from Simpsons voice)

Actually, by the time of Episodes 4, 5, & 6 the technology of cloning from Jango Fett's DNA had been lost. Most of the stormtroopers at the time of Episode 4 consisted of human recruits (as evidenced by their various heights, weights, and voices in the movies). Hence, the stormtroopers' lack of blaster accuracy cannot be attributed to cloning degradation.

Source: Wookieepedia

I watched this episode of Mythbusters on TV - man it's just not the same show without Tory, Grant, and Kari...

I totally agree. I miss them!

I'd buy into the whole 'Stormtroopers can't aim for shit' except in episode IV, when they attacked the Jawas and tried to make it look like Sandpeople, Ben Kenobi problaims "Only Imperial stormtroopers are so precise." http://www.moviequotedb.com/movies/star-wars-episode-iv-a-new-hope/quote_29886.html

Ben's been hiding in the desert for the last 20 years. Obviously standards have slipped in that time.

Also... magical space wizards.