fake services

[honey grp <honeypict () yahoo co in>]

hi,
   We are a project group of five working on
honeypots. We have studied many honeypots till now. So
far we have observed that most of the honeypots do not
proper login to fake services. They just show the
banner i.e. the Welcome screen for ftp and telnet ,
ask for login and password and say "Denied access".
Why don't they give a fake service like showing some
fake files or so??? 
   Is it that if the hacker gets the access he can
easily compromise the honeypot..... Plz let us know if
any honeypot allows the hacker to login properly and
give him the access.

regards

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