Corporate insider trading policies all bark and no bite?

Many corporate insider trading policies at non-finance companies have severe penalties, including fines or termination, but I can't think of an instance of a corporation investigating and enforcing a violation of, for example, a blackout window or shorting company stock, against a regular (not a Director or Officer) employee.

Can you?

Please note this question is not about actual insider trading (i.e. trading on material, non-public information). Don't do this. The SEC (but not your company) will catch you.

Just a thought: It seems like most companies lack the will or the means (your company can't subpoena you) to actually enforce their policies. So is the corporate insider trading policy all bark and no bite?