I've had a number of friends with various legal issues in the pasts, with varying results crossing the border. The main thing with US Customs is, always be completely straight with them, answer their questions exactly, and don't volunteer any more than they ask for. Their questions can vary in subtle ways, think about what they're asking, and answer directly. They can ask whether you've ever been arrested, charged, or convicted - answer appropriately.
If you've been arrested but had the charges dropped, then the answer to "have you ever been charged/convicted" is a simple "no". If they ask whether you've been arrested, just say straight up, "yes, but the charges were dropped". No need to elaborate unless they ask for more details.
Remember, they probably already know the answers to most of what they're asking you... if you're straight with them and don't contradict any info they already have, they're just as likely to let you through in spite of past indiscretions (well, as long as there are no criminal convictions).
If you say no to something as simple as "have you ever been detained", and they happen to know that you HAVE been detained in the past, there's a good chance they'll turn your ass right back around - just remember that they have ALL the power in the situation, and treat them accordingly, and you'll generally get along just fine.
Originally Posted by Godzira
Does anyone know how many to a signature?
Originally Posted by Brianrietta
Not a sebberry post goes by where I don't frown and think to myself "so..?"