Against City Code
I can remember reading about solicitors in the The Wylie News. Seems it said they were in violation if you had a sign posted. I Below is what I found on the city's code of ordinances. You might call the police dept and check what actions you can take against them.
Sec. 6-22. Depositing on private property.
(a) It shall be unlawful for any person to throw, deposit, distribute or cause to be distributed any handbills in or upon private premises which are inhabited, except by handing or transmitting any such handbill directly to the owner, occupant or other person then present in or upon such private property; provided, however, that such handbills may be placed or deposited in or upon such inhabited private property if such handbill is so placed or deposited as to secure or prevent such handbill from being blown or drifted about such property or sidewalk or street and other public places, and except that mailboxes may not be so used when prohibited by United States postal laws or regulations.
(b) It shall be unlawful for any person to throw, deposit, distribute or cause to be distributed any handbill upon a residence conspicuously posted with signs that indicate ''no handbills,'' ''no advertising,'' ''no soliciting'' or any similar notice indicating that the occupants of the premises do not want their premises to receive such items.
(c) The provisions of this section shall not apply, however, to the distribution of United States mail nor to newspapers, except that newspapers shall be placed on private property in such a manner as to prevent their being carried or deposited by the elements upon any street, sidewalk or other public place or other private property.
(Ord. No. 95-8, ?§ 1(10.2), 4-11-1995; Code 1997, ?§ 6-32)