Inactivity is fine providing you are in good standing. Even if you can't be bothered to put in a report the elders will make one up for you and not tell you they have done so.
You might say to an elder, "I have done nothing this month." Then they will say, "but you must have done something you can count time for, even if you can't remember." Then they'll help you to remember.
However if start questioning Watchtower doctrine and quoting scriptures straight from the Bible - that's it. You are suspicious. Just like if you say the name Jesus a bit too often, you might be an apostate.