robot email inquiry

every couple days i get a (robot sent?) email info request from my website to me, the webmaster. its a form for the typical website, contact us, send a message etc.
here is a typical email:
Message:
fabrik_internal_id :
time_date : 2008-11-16
last name : 1997
first name : fqiczahotw
address 1 : xCaiqjyRWv
address 2 : JUNyZndaM
city : xAioWqkfCt
state : CA
city : jQgyzXtayHuEloXXq

all the fields on the form are filled in. just wondering what it might be?
search engine robot?
filling out a form for info, i'm having a hard time figuring what value or purpose this would be for a search engine robot?
a hack probing attempt just to see if its a valid email and/or something else to prepare a hack attempt?
an email spammer probe to get a list of valid email addresses?
or something else?

bob

 

could be spam.bot.. try to add captcha into your form for security purposes.

 

thanks for the help, i see it all the time, now finally i know its captcha.
after checking out some scripts i see there are php, java, etc.
since it looks like a simple script, why would you not use java and have that short client/browser side processing as opposed to sending the form round trip to the server with all that time and overhead?
i suppose it would only be 1 necessary anyway trip to server if the captcha response was ok.
bob