As someone who was raised in this religion, it took an enormous amount of man hours and brain power to get to the bottom of what was going on with the JWs. They would tell you that I'm just acting like Satan or influenced by him if I tell you to avoid them. I'm telling you that I already know what they're going to tell you before they tell you. The aforementioned statement is a little like trapping a piece in a chess game--clever maneuver to restrict your thinking abilities.
Do not underestimate these people. They don't understand just how powerful their methods are, but they will use them against you. If you attend the Kingdom Hall, which is your decision to make though I would recommend otherwise, at least take a non-JW with you. Don't go by yourself. Don't let them isolate you.
If you already know what you know about them, there is no reason to attend. I'm attending tonight in support of my JW wife, but I do not and cannot ever believe their doctrine. And I loved it all, from start to finish I loved this religion. The heartbreak of finding out it was an illusion is something that you don't have to fear right now. You can be objective, critical and make a sound, informed decision.
For your sake, don't involve yourself with these people anymore. Better yet, get a copy of 'Crisis of Conscience' and bring it with you to the Kingdom Hall. Their reaction will be a YouTube classic if only you could record it. But...short of going there to cause trouble, there's no reason to go down this road. I am living its end result. You do not want to be in my shoes. Trust me. If you value your freedom, make sure these people don't get into your head. Feel free to send me a PM if there's anything I can do to help.