There's nothing worse than embarrassing yourself on social media, and if you happen to have a huge following, things become much worse.
The internet hates liars with a passion. They will thoroughly research every one of your claims and won't be shy about calling you out in front of everyone.
And unless you're a professional, don't even think about photoshopping your pictures because people will definitely give you a lot of sh*t about it.
Long story short, the internet contains all of human knowledge and everything people need to call you out on your bullsh*t. So don't even try, it's not worth it.