If we have done our job correctly we have left the impression of being a serious buyer. What you view as harassment is a commissioned salesperson's livelihood. Their job is to follow up until you say no. So why not just say no instead of getting your panties in a bunch and accusing them of harassment? If they then continue to call or email, it qualifies as harassment.
Equal rights for others does not mean fewer rights for you. It's not pie.
"I prefer someone who burns the flag and then wraps themselves up in the Constitution over someone who burns the Constitution and then wraps themselves up in the flag." -Molly Ivins
Never try to teach a pig to sing. It's a waste of your time and it really annoys the pig.