Just having been arrested can cause long term grief eg want to travel to the US or even transit through US and having been arrested complicates things a lot.
On some occasions when I've transited through the US I have has to enter through immigration clearance (fortunately I has done a ETSA), walk to emigration and leave the US, even when arrival flight was late and departing flight on time and I end up walking to departing aircraft as they are retracting the gantry.
Ian