# add this to your robots.txt:
#     User-agent: *
#     Disallow: /trap
#
# Make sure this URL is not linked from anywhere else. 
# Then when a user visits there you know they are ignoring your robots.txt.
# Add this snippet to your controller to block their IP.

BAN_IP_TIME = 60*60*24 
if cache.ram(request.client, lambda: False, BAN_IP_TIME):
    raise HTTP(503, 'IP blocked')   
def trap():                    
    cache.ram(request.client, None) 
    cache.ram(request.client, lambda: True, BAN_IP_TIME)
    redirect(URL(f='index'))