The 141% turnout, etc stories are all based on false premises. Does this mean there was not fraud? NO, of course not, but these over 100% turnout stories are bogus.
The danger to pushing this line is obvious, as it will make people hyping it look like fools, and thus discredit legit reports of fraud, as well as the fundamental principles that these people beieve in.
This is why we need to have proof of everything we see. I would contend that whenever you go to the polls whether you are a poll watcher or as a voter you should bring a small video camera (preferably one that adds a date and time stamp) to record any shenanigans you may see.
I would add that you should have the type of camera that will automatically send what you record to a remote location. That way if the powers that be confiscate it you will still have a record.
Also keep in mind that many police unions are part of SEIU so your evidence may be "inadvertently" erased so make several copies before you turn them over