host your own vps then, there is no 100% foul proof method, the key thing is to never get into the feds radar, if you follow good opsec and know what you are doing, you won't get caught. what you are asking here is, "what if police get hands to my data" , if you let it get to that point you are already in trouble, don't think of what you'll do if you get caught, but focus on how not to get under suspicion, super illegal or not, the data is always stored somewhere so at least if you have your own proxy servers and your own cloud, you have control of your data, so no matter what if somehow you compromise your security, you are done, learn more about encryption and shit and remember there is always a risk of you getting raided so don't think you are 100% annoynomus. I wish you good luck.