(CNN) In an act of social media solidarity with high school seniors who are finishing out their final semester at home, Facebook users are sharing their own senior photos with the hashtag #Class Of 2020. It’s a sweet sentiment, sure, but beware: Your post could help potential hackers crack into your private accounts, according to the Better Business Bureau, a nonprofit that tracks, among other things, internet scams. Malevolent scammers can scan sites for this hashtag and find the name of your high school and your graduating year — two common online security questions. And if your social media account isn’t locked up, they can find out a lot more about you. Read more…