No they don't, you can request a reply but most people will not do it for
the following reason. Its not a good idea to have a valid e-mail address on
these groups as spammers regularly trawl the listings to obtain new victims.
Once they get you will be hit by relentless unsolicited crap. A word of
advice, most of these annoying spams will have a check box somewhere
inviting you to unsubscribe to their attentions. DO NOT under any
circumstances check and reply. All this does is confirm that your address is
valid and they will sell it on to other lovely people so you get even more
crap!
Regards,