I think there two types of Satanic worshipers. Gibbering retards, also possibly into sniffing glue, backyard wrestling, and stabbing themselves with sharp sticks. If you actually believed in Satan, then there's really no valid reason to worship him other than being stupid. The second group of people use Satan as a symbol for independence. They are just atheists usurping a symbol and engaging in an elaborate troll attempt.
All are under the law. The question you should think long and hard about and ask yourself 'Am I still under judgement?'
No. We are led by the Holy Spirit and thus the law has no part in the Christian life (see Matthew 5:17, below). You are justified by faith in Jesus Christ apart from the law. The law requires works of the flesh. As a Christian, we walk by faith in Christ (under grace) not by faith in our flesh (under law). Christians defer to the Holy Spirit; not to the law...
"The Law is complete in Him (the Holy Spirit) and He being in us should have NO second thoughts in following it as well." (Matthew 5:17)
"Therefore the Law has become our tutor to lead us to Christ, so that we may be justified by faith. But now that faith has come, we are no longer under a tutor. For you are all sons of God through faith in Christ Jesus." (From Galatians chapter 3)