it all depends on your income... along with your parents' income. if you are banking in more than 65k per year amongst the 3 of you, in rhode island... because of cost of living and such... u are looking to slim to none financial support.
i think the way you are seeing it is WRONG! just because you get some help, means you can slack and do bad or what not is not a good idea. if you think that just because you're not paying for it, it doesn't matter if you fail it. i think you need to rethink that, because u should see it as an opportunity for you to advance yourself, not a chance for you to slack if it's not costing you much or is "free".
additionally, if you are getting financial support now, this will affect the status of your siblings that will later attend colleges and such when they try to obtain financial assistance.
again, i guess people views opportunities differently but with education, having a big F on your transcript doesn't look so hot. nevermind an F people will look down on your C.