When I was active, I was delighted to have the opportunity to discuss the scriptural teachings I had learned. Ominously, even J.W. elders who put themselves in a public place at a trolley will very quickly end a conversation and refuse to discuss any of the org's scriptural/organizational corruptions. They'll claim it's because they're not prepared to argue or debate.
As moreconfusedthanever said, they'll terminate the discussion by saying you should visit their God-blessed website for answers.
Every J.W. who uses this as a get-out-of jail-free-card is flagrantly rejecting the Biblical command for Christians to respectfully defend/explain their beliefs to anyone who demands a reason for such beliefs. (1 Peter 3:15)