is this webpage legal or illegal?

I am going to do a webpage like www.complaintsboard.com ... My webpage is www.complaintsboard.com.au

first if i publish that web page in australia, will i be in trouble? because ppl will publish complaints againsts big companies,, will they sue me?

I have used " complaints board australia" can i write like that .. (can i use australia)

I have inserted terms and conditions for use this page. will it protect me?

Thank you