A well organized, mult-shotgun, simultaneous blasting of the sign would be a very quick and effective way of sending a message. At some point, you have to punish not only those who are renting the space, but those who are renting it to them.*
*This commentary has been made for entertainment purposes only. In no way is this a recommendation for the suggested action to be taken. Neither JesusShuttlesworth or KSUFans.com are responsible for actions taken that may be similar in nature to those suggested in the above entertainment commentary.