The windows of restaurants and businesses are often crowded with signs and stickers denoting store hours and accepted credit cards, but a Leesburg restaurateur is looking to add one more decal in the name of constitutional rights. Bryan Crosswhite has created 2amendment.org, an online database where gun-rights businesses can register their names and addresses and get stickers for their windows that signal they are friendly to legal gun owners who exercise their right to bear arms. “We want to make it something for business owners who are pro-Second Amendment,” said Mr. Crosswhite, owner of The Cajun Experience. “A sticker on...