I asked the question as I was curious, and I wanted to see the emotional level of your response...
If you are asking if they will weigh your bike at a CATV or a citizen's 20 mile crit, no. Unless you are obviously cheating, you will probably not get called on it...
However, if you win with an illegal bike and don't get caught, I guess you can live with that.
CATV racers are trying to learn how to race. I did some officiating and raced at the CATII level, but the skill level of V's is such that it really does not matter.
If you get caught riding an illegal bike, then you'll have to deal with your fellow racers at future events.
I would not want to play golf with you.
BTW...racers use the lightest stuff they can get (or afford if an amateur) and not cheat.
They don't drug test at these races, either....