The actions of the Royal Navy's press gangs may have been technically legal and proper for them to do to British subjects. The press gangs, however, didn't really pay too much attention to the citizenships of the drunks they gathered off the streets -- or off other ships, on the occasion that the RN press gangs boarded another ship purportedly looking for deserters.

Their habit of picking up sailors off American merchant ships and impressing them into British service with false desertion claims ("well, hell, they're just rebellious colonials anyway") after the American Revolution was one of several causes of the War of 1812.