icdsoft

It is quite unlikely that the "unlimited" traffic you are paying for is truly unlimited. There is always a catch with such "unlimited" offers.

This is something absolutely unthinkable in our company. However, we have heard of other providers using similar tactics in the past, so always do your research before trusting a provider with your website.

I guess there may be hosting providers that are that insecure, but I doubt it. There are many ways you can secure and isolate the users. SuExec, grsecurity, strict security policies, 24/7 monitoring are just some of the things a reputable hosting provider would have.