I regularly get seventh day Adventist door knockers coming to my house. I don't mind I actually enjoy having a chat and agree with much of what they have to say and what is in their handouts. My issue is that I feel kind of guilty, like as if I am leading them on r something - because I am catholic, and I know I will never be swayed from my religion for another. Although I don't have a great record of actual church attendance, I am firm in my faith.
I am not sure if I should be saying something to the people when they door knock (they aren't always the same people), or what?
Am I just wasting their time and leading them on?

I am unsure, because as a catholic I was brought up to talk about religion with people of all denominations, but there was never ever the view that we should try and convert anyone (but rather look for the similarities between the religions and focus on those rather then our differences). I understand that 7th day Adventist have a different view to this, and I don't want to be wasting their time or resources giving them a false belief that I might convert or whatever.
I'm not sure if this even makes any sense. I enjoy the chats and discussion, but come away feeling I have somehow been misleading or untruthful, and I don't like that feeling.