One of the problems with living in an unincorporated community like Spring is...there are very very few ordinances. The ones that are in place are by the county, and the Harris County Sherriffs Dept. and Constables don't have enough man-power to enforce many ordinances in the unincorporated areas.
The HOA and community management company that handles my neighborhood have posted signs that say "deed restrictions strictly enforced". While these could be intimidating to some, they don't have any teeth. They are useless. Solicitors are free to roam the neighborhood, but they are not supposed to ring the doorbell of homes posted with a "no soliciting" sign.
I printed a sign with a nice peaceful background, with highly contrasting lettering on it that says "No Soliciting and No Trespassing". When they come to my door and have the audacity to ring the doorbell, I open the door and point at the sign with a pretty annoyed look on my face. Of course, the first thing out of their mouths when you open the door is "I'm not here to sell you anything". I just say "good, but you didn't have to call me to the door to tell me that". Then I shut the door.
I've had a couple that rang the doorbell again and when I re-opened it, I asked them if they saw the sign. They always say yes. My response...So you understand that I have given you notice that you are trespassing, and you are refusing to leave? I will now call the police to let them deal with you. I then shut the door and watch them scurry. I really don't like solicitors.
And it is almost that time for them to start selling again. (Two Girls Scouts and a Troop Leader in my house. No chance of me missing any cookies! lol)
ammo two...I'm in the same boat. Two Girl Scouts and a Troop Leader who will also be the "cookie manager" for the troop come January!!! 
Their troop sold over 1600 boxes last year. That will dominate a dining room, I assure you!