Enforcicng by laws

If it is not compulsory for an EC to enforce by laws, then where does this leave owners?  If an EC picks and chooses which by laws they enforce (and for whom), what can they do if a once by law abiding owner just decides to break a by law?  If the EC has a record of doing a bit here and there, can they then come down on an owner who decides to join the rebel pack?

We have an owner who has made a complaint to the EC about another owner’s behaviour in breaching by laws. The owner who lodged the complaint is still waiting for acknowledgement/reply/action – anything from the EC. If the EC doesn’t do anything about this breach, then can this owner break a by law themselves with impunity if they have proof that action isn’t taken on other matters?  While this owner waits, and waits, the last time another owner made a complaint about a by law, the notices/letters came out to all!

Why should some jump through hoops, dot the i’s, cross the t’s if others are left to their own devices?  And why should the complaints of one be heard, and of others seemingly ignored?