Just be glad they're bolted to the floor. Ever see how the old VW bug"s bucket seats were attached to the floor pan? You'd be thanking Ford for using bolts.
My 1962 Bug had the seat tracks tack welded to the floor pan. Some of the welds failed and the seat literally just fell backwards with me in it! I got some angle iron, drilled 4 holes into the pan and clamped the seat rails to the pan. It was a pain to adjust though, had to loosen the bolts to slide the seat rails, but that wasn't very often.