An academicc has posted research in the USA that points to a disturbing trend (although a fightback has commenced with many state laws being declared unconstitutional)
Many of the laws are reflected in the UK ..like Sarah's Law..tabloid driven psychobabble ushered in under the auspices of Jacqui Smith, a politician who not only deprives the homeless (at least one million in the UK) of funds by falsely claiming her sister's bedroom as her home-but whose husband racks up porno dvds at the taxpayers expense.
There's also an exhaustive list of people convicted after false accusations:
# An estimated 19,000 people are on US sex offender registries for behavior when they were children or adolescents — some younger than eleven years old — many of them for innocently “playing doctor” or for normal, consensual, teenage experimentation.
# Sex offenders include people whose only crime was breastfeeding their baby or urinating behind a dumpster.
# One out of every 220 adult men in the United States is a registered sex offender.
# The federal sentence for photographing a 17-year-old boy with an erection is about twice as severe as for attempting to kill him — and about four times as severe as for beating him up so badly that he accidentally dies.
www.solresearch.org/~SOLR/index.asp