I'm a CAT 4 racer, will I be suspended from racing by UCI / USAC if I participate in non-sanctioned races? I'm not a pro, just a CAT 4 racer with a USA Cycling License. Can I be suspended and fined by UCI / USAC if I participate in non-sanctioned races? I've heard they are cracking down on licensed pros racing in non-sanctioned races, but does this apply to everyone?  What is the likelyhood of that actually happening?

UCI 1.2.019 rule states “No license holder may participate in an event that has not been included on a national, continental or world calendar or that has not been recognized by a national federation, a continental confederation or the UCI. Breaches of articles 1.2.019 or 1.2.020 shall render the license holder liable to one month’s suspension and a fine of 50 to 100 Swiss francs.”
The UCI has subsequently clarified that the rule extends to ALL
  UCI-licensed riders, even those not associated with a UCI team. This
  rule only pertains to those riders holding an international/UCI
  license.


See Reference on Rules Clarification from UCI/USAC:
http://www.usacycling.org/clarification-of-uci-rule-12019-and-related-sanctions.htm

So, what it boils down to  is that if you're just a USA Cycling licensed rider, but do not hold an international UCI license, then this rule does not apply. If you do hold an international UCI license, then it does.

Update:

It appears that the rule will not be enforced this year, 2013 and is planned to be enforced in 2014.  


  The UCI listened to the feedback from the various groups involved and who feel affected by a strict and immediate enforcement of rule 1.2.019 and its associated sanctions. The UCI has decided to postpone strict enforcement of rule 1.2.019 in 2013 with the expectation that all stakeholders (National Federations, race directors, teams and riders) will discuss and do what is necessary to prepare for the rule’s full enforcement in 2014.


Reference: http://www.usacycling.org/update-on-uci-rule-12019.htm