When entering the USA I am often asked "Have you ever been arrested?" to which, fortunately, I can honestly answer "No."
Question 'B' on form I-94 also begins "Have you ever been arrested...?"
At home, I know of multiple instances of police arresting people with no criminal record just to release and never charge them. For those unfortunate people, what are the consequences of answering "yes" to "Have you ever been arrested?"
In other words, how severely would being mistakenly arrested at home impact my ability to travel to the USA?