Zac Efron is not having a great week. Sure, the star's highly anticipated Dirty Grandpa (co-starring legendary Robert De Niro) opens this weekend, but first he has to deal with a much more immediate problem: Twitter. You see, the actor has managed to inspire the ire of the social media site not once but twice in just a few short days. And while some may scoff and dismiss social networking, they do it at their own peril. So how did this former Disney golden boy anger masses of fans via social media? We're glad you asked.

He Bailed On The 'High School Musical' 10-Year Reunion
 

Can you believe it's been ten years since the Wildcats burst onto Disney with a song in their heart and a swing in their steps? The movie franchise proved insanely popular, and now the stars are reuniting to look back on the phenomenon their singing spawned. The only problem? Zefron won't be attending. Everyone else from the main cast is showing up, but Efron is playing hooky from the highly anticipated event--and Twitter is not handling the news well.

Rumors abound over why exactly Efron turned down the invitation. He is admittedly filming a message that will air during the special, but considering that the rest of the cast was able to appear, that's cold comfort to say the least. The official reason is that the Dirty Grandpa press junket prevented him from showing up in person to remember the film that launched his career, but others suspect there might be different reasons at work.

One prevailing theory is that Efron bailed to avoid running into his ex and co-star, Vanessa Hudgens.

Still other fans took a far more philosophical view to the turn of events, pointing out that sometimes art really does imitate life.

He Made A Questionably Post To Celebrate Martin Luther King Day

While most of Twitter was still reeling from Efron's absence regarding the High School Musical reunion, the actor made another faux pas--this one regarding a much more serious topic. Although many actors and celebrities honored Martin Luther King, Jr., most didn't equate him to their Instagram counts. While it's pretty obvious that Efron didn't mean any harm with his ill-chosen words, Twitter was quick to point out that this wasn't exactly the way to honor an iconic and important figure like the late, great Martin Luther King, Jr.

Some thought this Tweet said more about the people Efron was employing on his social media accounts, and offered helpful advice.

Then there were those who hilariously skewered the actor's unfortunate choice of words.

But even with countless responses to choose from thanks to the power of the Internet, we think this one sums things up the best:

Considering his fame and career (not to mention a finely chiseled physique), it's safe to say Zefron will bounce back from these social media slip-ups. But this situation does provide a powerful reminder that no matter how famous you may become, at the end of the day you'll still have to answer to the Internet (especially on Twitter).

Tags: Zac Efron instagram Twitter high school musical high school musical reunion mlk Martin Luther King