How do I protect my site from spammy backlinks?

Selected answers from the Dumb SEO Questions Facebook & G+ community.

• 
  Ammon Johns: First things first. Have Google notified you that you have a penalty, or have you simply lost some rankings during all the recent algo changes and are making assumptions?
  
  
• 
  George Georgiadis: Where did you brought them from so other members do not do the same?
  
  
• 
  Ammon Johns: George Georgiadis he already said he didn`t buy them. Spammers link out to hundreds of legit sites in the hopes it will make their spam links look more legit, or at least, help hide the spam like a needle in a haystack.
  
  
• 
  Michael Martinez: "I`ve never bought backlinks for it yet today I saw that there`s a whole bunch of supper spammy inbound links..."
  
  If you`re not doing anything to violate the search engine guidelines, and if you know the client isn`t doing to violate the search engine guidelines, then they are NOT "spammy links."
  
  Link spam "links I don`t know about and that look funny"
  
  Link spam = "links placed in violation of search engine guidelines"
  
  
• 
  Alexa Han: Michael Martinez but can google differentiate it? Because it`s coming from high spam websites
  
  
• 
  Michael Martinez: Alexa Han The people who buy backlinks try to buy them from Websites they believe look "normal" to search engines.
  
  Without knowing what links you`re worried about, I can only say it`s highly unlikely you`re looking at anything you need to worry about.
  
  But you can always disavow them if you feel you can`t let it go. Better to disavow than fret over what Google might do.
  
  
• 
  Alexa Han: Michael Martinez I checked and they`re links from Indian sites with high spam score
  
  
• 
  Michael Martinez: Alexa Han Ignore any SEO tool that scores sites for spam.
  
  It doesn`t sound like you have anything to worry about.
  
  
• 
  Joshua Choate: Disavow the backlinks in GSC.