Purple text denotes sarcasm. For example:
OMG! If you open carry you will be the first one shot and any five year-old girl can disarm you!
More examples...
http://www.migunowners.org/forum/showthread.php?t=191485
Use of colored fonts is strongly discouraged on OCDO for any routine use and is not recognized here as defining sarcasm. Such brings unfair/unwarranted attention to one poster over another - yes there has been a problem with that in the past. Such postings will be edited/deleted.
Insofar as duct tape to cover part of a sign - I have seen municipalities do that as a temporary measure, so no I didn't conclusion jump when I saw such reference on this thread.