Yeah we get Jehovah's Witnesses - I just let them excitedly tell me all about their beliefs for ages and pretend to be interested. Then eventually I will say something like - Well, that does sound reasonable - I will have to tell my husband about this.
They tend to fid an excuse to leave after that - which is at least one nice thing about them, some other groups - will tell me that my "lifestyle choices" are immoral and I will go to hell. Jehovah's don't - they just leave.