Shoud rogue robots be blocked or rather not?

[polonus]

See the list here: http://www.braemoor.co.uk/robotreport.php
It might be counter-productive to block all. But rogue mail harvesters as such. What criteria are there?
See for instance: http://www.projecthoneypot.org/ip_119.63.213.123
Here you see harvesters arranged by last bad event: http://www.projecthoneypot.org/list_of_ips.php?t=h
Like to hear your views on this?

polonus

[polonus]

Here I checked on an e-mail address harvester: http://www.abuseipdb.com/check/?ip=205.186.130.61
And indeed reported by iPillion, but not given here: http://blackip.org/?nipbox=
See: http://www.google.com/cse?cx=partner-pub-7304917892182792%3Aqimzin-n3mh&ie=ISO-8859-1&q=205.186.130.61&sa=Search#gsc.tab=0&gsc.q=205.186.130.61
And no data given here: http://www.projecthoneypot.org/ip_205.186.130.61

polonus