Shared server: secure configuration ?

Hi,

I have a website hosted on a professional shared server (not free) but
at the moment, .htaccess files are deactivated. I am going to suggest
they allow us to use them, and I was wondering: what can I reasonably
ask for, that doesn't pose a security risk, as the server is shared
between many different users ?

I absolutely need *AuthConfig* and *Limit*, and I don't see what could
go wrong with *FileInfo*. Maybe *Indexes* and *Options* are more risky??

Any help or explanation welcome!

Thanks.