Most believers think that it's better to practise any religion than to act like an animal and not practise any.
Even my dad who used to dislike the JW's when he was alive, told me once, "You're better off going back to that religion, than not practising any religion at all". I'm a believer like he was, but it's funny how most believers will say that practising any religion is better than not practising any.
JW's wouldn't agree, because they think that only their religion is the right one, even though a wrong religion may have a postive influence on somebody's behavior and happiness.
The only thing a JW looks at is the carrot "eternal life". They won't look at the good that may come out of practising another religion.
After my JW experience, I won't go to any other religion. My dad knew this, and that's why he told me back then, I should go back even though he didn't agree with their beliefs and especially their way of breaking up families and screwing up lives.
Overall, he felt that practising any religion was better than not practising any, because he felt that you had to gain salvation.