There is a petition you can sign titled Target: Create Gun Sense Policies in Your Stores.
The web page at the above link with the petition quotes The Wall Street Journal as saying:
Target, which boasts on its website that between 80% and 90% of its customers are women, has no restrictions on customers carrying guns in its stores.
As a new stock holder in Target, I figure I should have some say in their policies. If the petition page had allowed me to, I would have sent them a copy of my sign that Target could post at their front door, and on the their web site.
Well, I just took my own advice. I sent a copy of this poster to Target’s Investor relations department. firstname.lastname@example.org