i agree with you and appreciate your spreading the word. i had two nice young mormon missionaries at my door three weeks ago and spent about 20 minutes explaining to them why they aren’t Christian. the way they reacted, i may have been the first one to tell them that!!
When they show up at our door, I invite them over for dinner at some date. This way I have a captive audience for 2 hours (they set aside the whole evening and are always starving). I don’t let them pray and they are too polite to leave abruptly after being fed. Plus they dont’ have the excuse that they need to be somewhere else.