"My rules or get out" is not a good way to teach children to compromise (and we hear that rhetoric so often when being critical of how a country is run, where this is learned I see clearly now..) or negotiate with other adults. You risk casting your children to the wolves, and I've seen friends devoured.
In this case, you should be able to calmly sit down and explain to your parents how you're contributing (if you aren't, start) as an adult in the household - maybe paying $20-50 a month rent just to start. It may be an inconsequential amount, but it at least starts you on the path to full responsibility for yourself.
If "at home" is always paired with "my house, my rules", it is no surprise that "not at home" (moving out due to anger, or going away to school) leads to excessive partying and poor decision making.
Pearsonartphoto made this point already about gradually getting more freedom, but I am suggesting you earn it (and do the work first, don't request that you have it up front), but sending your 18 year old to bed at 1900 is ridiculous and will never accomplish anything long-term or meaningful, because it operates on the presence of constraint, not on the inevitability of consequence.
Get a part time job, offer to pay for the house internet and see if your parents will dollar-match you for your own laptop. If they refuse this, then bide your time. You'll be free soon enough. You can't do a whole lot if your parents are unreasonable or don't see the basics entry points for accountability and responsibility - but the flip side is that you likely will miss living at home due to all sorts of unappreciated things if you just up and move out.