Acorn didn't commit any fraud. They were cleared 2 years later.
The short answer is yes.
It's possible since the machines are proprietary, and election overseers don't have to be neutral. That means some states can and do have a Republican or a Democrat in charge of their entire state's secret voting technology.
The longer answer is that there is no evidence of any electronic voter fraud. In several states there were issues with e-voter machines malfunctioning and switching votes, but that was a software issue that was corrected wherever it occurred. In the Gore-Bush race there were also issues with machines in Georgia turning off wherever temperatures went over 75 degrees. Which is silly.
exampleBut yeah, I'd fight electronic voting machines wherever they are, UNLESS they have a printable voting receipt that shows who you voted for. I love those.
I'd also fight placing outdated and confusing punch-type machines in poor districts as well. But receipts are all-important.