I've noticed a few spammy links pointing to my website.  Some of these existed from before I registered the domain, and some of these are new, possibly placed by competitors.I understand that Google can potentially penalize you for this, and I know that some people have received warnings from Google about it.However, is it possible that Google identifies the spam, penalizes you, and doesn't inform you, or will Google always tell you?
Will Google always tell you if you've been penalized for spammy links?
seo;google