How Do you View Jehovah Witnesses?

I've no problem with their beliefs, I do have a problem with them calling on me unannounced, trotting out some things they've been taught, having no answer at all when I start to question it, abandoning it to move onto the next way of potentially winning me over, and moving though the gears until they finally hit anything that engages me, little realising that belittling evolution, telling me that man hath dominion over the animals, and hinting quite subtly that it's wrong to be gay are not going to endear me to anyone.

Have your viewpoint but if you're going to attack mine, at least engage me in a discussion about it. I'm open-minded enough to listen. Moreso than they were, anyway.